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(Click for frequent words.) 56 SCNP 56 Fluid Status 55 Bispectral Index 55 hippocampal sclerosis 55 Vasotrac 55 Electroencephalography 54 somatosensory evoked potentials 54 implantable glucose 54 OptiVol ® 54 ThinkVision L#x Wide 54 cardioverter defibrillator 54 Transcranial 53 bacterial virulence 53 Nellcor OxiMax 53 nanotools 53 Continuous glucose 52 INVOS Cerebral Somatic Oximeter 52 haemodynamic 52 Cardio3KG 52 cerebral autoregulation 52 Optical coherence tomography 52 Corventis 51 cerebral oximetry 51 Lumbar Interbody Fusion 51 Hemodynamic 51 color Doppler sonography 51 hemodynamic measurements 51 FibroScan ® 51 multimodality imaging 51 Optical Coherence Tomography 51 transesophageal echocardiography 51 transesophageal 51 Cellvizio 51 tissue oxygenation 51 Muscarinic 51 Implantable Cardiac 51 Propaq M 51 continuous hemoglobin SpHb 51 visuomotor 51 MotionPod 51 near infrared spectroscopy 50 electrocardiography ECG 50 microelectrode array 50 Peptidomics 50 Intravascular 50 photon laser 50 risk reducing salpingo 50 electrophysiology EP 50 tPEMF tm 50 microsensor 50 INVOS 50 Cardiac Defibrillators 50 Neurostimulation 50 microRNA profiling 50 Elastography 50 Clinical Relevance 50 Biphasic 49 microdialysis 49 biologic pathways 49 Transesophageal 49 Neuroprotection 49 Perfusion CT 49 Methylnaltrexone 49 transcranial 49 CARESCAPE Monitor B# 49 implantable cardiac 49 Smart Capnography 49 microsystem 49 Intravascular Ultrasound IVUS 49 Digital Addressable Lighting 49 micro electromechanical 49 HepaMate ™ 49 PET tracers 49 Left Ventricular 49 Scintigraphy 49 Afib 49 biophotonic 49 pulsed electromagnetic field 49 SyncMaster #DX 49 Microstream 49 electrosurgical generator 49 OmniVision OV# 49 Samsung #RZ 49 CardioQ 49 Mucosal 49 transcranial Doppler ultrasound 49 repetitive transcranial magnetic stimulation 49 maternal fetal outcomes 49 fluorogenic 49 InSpectra StO2 49 color Doppler 49 UFIT R 48 electroencephalographic 48 Neurogenic 48 Ventricular 48 breakthrough noninvasive 48 Cardiac PET 48 GlucoLight 48 Magnetic Resonance MR 48 NIR spectroscopy 48 inhaled anesthetics 48 neural prosthetics 48 cardioverter defibrillators 48 Brodmann Area 48 Infinity OneNet 48 esophageal manometry 48 neural prosthetic 48 glaucomatous 48 EndoPAT 48 glucose sensor 48 StO2 48 non dispersive infrared 48 clinical neurophysiology 48 Ischemic 48 transcranial Doppler 48 retinal implants 48 ambulatory cardiac 48 electrostimulation 48 Closed Loop Protection 48 Reveal XT 48 FlexScan 48 ATI Eyefinity multi 48 Implantable Cardioverter Defibrillator ICD 48 syngo R 48 physiological parameters 48 neuroprosthetics 48 radiofrequency RF 48 perfusion MRI 48 Artificial Cornea 48 SSAO 48 Holter Monitor 48 EnSite Velocity System 48 Invasive Fungal Infections 48 multifocal lens 48 FORE SIGHT 47 cerebral perfusion 47 hemodynamic parameters 47 multiplex assay 47 Infarct 47 Mitral Valve Repair 47 IrSimple 47 OxiMax 47 trigeminal 47 diagnostic prognostic 47 NIBP 47 subthalamic nucleus STN 47 intrathoracic impedance 47 smart pillbox 47 bioartificial liver 47 Clinical Outcome 47 MelaFind R 47 noninvasive technique 47 Dyna Vision 47 electrophysiologic 47 cardiologic 47 Signal X6 47 MicroPulse 47 multi analyte 47 photoactivation 47 transthoracic echocardiography 47 near infrared spectroscopic 47 dSLIM 47 perfusion imaging 47 Thrombus 47 bispectral index BIS 47 Antitumor 47 hypothalamic pituitary adrenal axis 47 CEA LIST 47 eFlow ® 47 Minimally Invasive Treatment 47 PEMF therapy 47 LTQ Orbitrap Velos 47 FotoNation FaceTracker 47 neoplastic diseases 47 posterior cingulate 47 neuropathologic 47 metastatic lymph nodes 47 L#W [001] 47 f ENGINE 47 Propaq 47 Nuclear Receptors 47 WavSTAT 47 anterior temporal 47 zNose 47 Nerve Stimulation 47 StereoMirror 47 transesophageal echocardiography TEE 47 computed tomographic 47 Estrogen Receptor 47 CRT LCD 47 Innate Immunity 47 Platelet Function 47 retinal nerve 47 Acuson S# 47 VGA SVGA 47 radionuclide imaging 47 biomarker identification 47 pH ORP 47 Non Invasive Blood Pressure 47 multiphoton microscopy 47 cCTA 46 vivo glucose 46 CardioMEMS proprietary 46 SPECT CT imaging 46 CT urography 46 ADI iMEMS 46 Glucocorticoid 46 Intraocular Pressure 46 cerebral cortical 46 cardiac magnetic resonance 46 CO Oximeter 46 fluorescence endoscopy 46 SoftScan ® 46 retinal implant 46 Angiographic 46 CleveMed 46 Continuous Emission 46 functional electrical stimulation 46 MEMS NEMS 46 COR Analyzer System 46 BCIs 46 GAMMAGARD 46 Freeze Framer 46 serum electrolytes 46 DCE MRI 46 Electrical Stimulation 46 Contrast Agents 46 computed tomography SPECT 46 aspheric optics 46 Capsular 46 VG#H 46 Enzyme Linked 46 Immunologic 46 habenula 46 Placental 46 fluorescence spectroscopy 46 AF Suppression 46 Protein Expression 46 fluorescent microscope 46 Atopic Dermatitis 46 spectroradiometers 46 Radiographic 46 EEG biofeedback 46 Blood Flow 46 multisensor 46 bioelectrical 46 neural prostheses 46 bronchoscopes 46 EndoTool 46 computed tomography CT scanner 46 Erythropoietic 46 Nodule 46 PEMF 46 Brain Metastases 46 rCBF 46 chemometrics 46 PressureWire Certus 46 oculomotor 46 LifeShirt 46 transfection reagents 46 electrode arrays 46 MALDI-TOF/TOF 46 Nerve Stimulator 46 THz imaging 46 noninvasive diagnostic 46 HPA axis 46 Pathogen Detection 46 OptiVol 46 insertional mutagenesis 46 Electromyography 46 Corus CAD 46 perimetry 46 Kinesia 46 Chemokine Receptor 46 Hematopoietic 46 Welch Allyn Connex 46 lensless imaging 45 interparliamentary relations 45 InterStim 45 Intracranial 45 ophthalmology dermatology 45 Kai Sensors 45 electrophysiological 45 biomagnetic 45 Metabolic Disorder 45 WatchPAT 45 Diffusion Tensor Imaging 45 gadolinium enhancement 45 Cytometry 45 Cell Adhesion 45 electrocardiographs 45 protein electrophoresis 45 Artida 45 Force Microscopy 45 Immune Tolerance 45 transdermal glucose 45 ultrasensitive disposable electrode 45 Microstream R capnography 45 Biochips 45 predictive diagnostics 45 capnography 45 neurosensory 45 Intracardiac 45 LIFEGARD 45 laser optics 45 nano electromechanical systems 45 nanosystems 45 micromechanical 45 Western Blotting 45 nanochips 45 metabolite concentrations 45 Homeostasis 45 EECP ® therapy 45 noninvasive glucose 45 inotropic 45 BenQ Senseye 45 caries detection 45 Radiation Dose 45 Color Doppler 45 nano fluidic 45 OptiVol Fluid Status 45 BioZ R 45 respiratory gating 45 Imaging Technique 45 Insulin sensitizers 45 electromechanical coupling 45 bi phasic 45 blood oxygenation 45 confocal microscopes 45 neural stimulation 45 neuromonitoring 45 laser Doppler 45 SpO2 45 Z Backscatter technology 45 color Doppler ultrasound 45 biventricular pacing 45 myoclonus 45 microcirculatory 45 cerebral oxygen saturation 45 transcutaneous electrical nerve 45 urinary cytology 45 transcranial magnetic stimulation TMS 45 Interferon Gamma 45 Zone Sonography TM 45 pulsatile flow 45 electromyography 45 Angiogenic 45 wearable sensors 45 computer tomography CT 45 Nonin 45 AV fistulas 45 blood oxygen saturation 45 Genetic Variation 45 magnetic resonance spectroscopic imaging 45 dorsolateral prefrontal 45 Epidermal Growth Factor Receptor 45 Micro electromechanical 45 NETDJ News Desk 45 biosensing 45 IntelliVue 45 frontoparietal 45 Ion Trap 45 LifeScan blood glucose 45 PET Positron Emission Tomography 45 perfusion defects 45 neuroprosthetic 45 Elekta Axesse 45 GentleWaves 45 cerebral oximeter 45 Radiofrequency Ablation 45 valve positioner 45 Pulmonary artery 45 biomolecular interactions 45 superparamagnetic iron oxide nanoparticles 45 MagicColor 45 HYPER CEST 45 epigenomics 45 Occlusion 45 V RADS 45 Tumor Targeting 45 toric lens 45 SAXS 45 neuro stimulation 45 interparliamentary ties 45 magnetic coil 45 electrochemical sensor 45 NeuroArm 45 Emotiv EPOC 45 biostability 45 transcranial magnetic stimulation 45 L#x Wide 45 piezoelectric transducer 45 eG Enterprise Suite 45 bioelectronic 45 closely Paustenbach 45 cystoscopic 44 implantable neuromodulation 44 Echocardiography 44 fluidjet 44 denervation 44 Endothelial 44 Perceptrak 44 Lexar LockTight 44 primary GeckoSavants 44 electromedical 44 Venous 44 antimicrobial coatings 44 diffusion tensor 44 opto acoustic 44 monocytes macrophages 44 endogenous cannabinoid 44 VentriPoint creates 44 flexible bronchoscope 44 Multiparameter 44 Interoperability Standards 44 Cardioscan 44 ECG waveform 44 fluorescence resonance energy 44 SightSensor 44 Hematopoietic Stem Cell 44 RECEPTORS LLC 44 Quadrivalent 44 chronotherapy 44 Cerebellar 44 oximetry 44 stimulation TENS 44 nanomedical 44 Photoacoustic 44 LIPUS 44 eG Enterprise 44 MicroTouch ClearTek II 44 physiologic parameters 44 Shows Promise Against 44 electrochemical sensors 44 blood glucose meter 44 inch MultiSync 44 Echocardiographic 44 OLED microdisplay 44 DNA nanotags 44 pupillary 44 cardiac defibrillator implanted 44 somo • v 44 Antithrombin 44 gyri 44 Gas Analyzer 44 Anti Inflammatory Drug 44 Electrophysiological 44 LumaGEM 44 Oxygen Saturation 44 Rab5 44 Randomized Controlled Trials 44 Nitric oxide NO 44 Nuclear Receptor 44 allodynia 44 biosynthetic cornea 44 Magnetic resonance 44 enzyme kinetics 44 musculoskeletal diseases 44 imaging MRI 44 Oximetry 44 Tumor Response 44 Home Pressemitteilung 44 metabonomics 44 electrode array 44 Transcriptional 44 Tod Strohmayer 44 adrenocortical 44 fingertip pulse oximeter 44 GeckoSuper ™ 44 Neurotrophic Factor 44 Inhibitory 44 SynthaGram 44 Begin Clinical Trials 44 powder diffraction 44 Coronary CT angiography 44 Urinalysis 44 Human Antibody 44 Recurrent Breast Cancer 44 infrared sensing 44 Inflammatory Arthritis 44 Thyroid Hormone 44 neurostimulator 44 Neuroprotective Effects 44 Spectral Imaging 44 piezoelectric actuator 44 prefrontal cortical 44 Innate Immune 44 Nonin Medical 44 Synaptic Plasticity 44 Scanning Probe Microscopy 44 automated radiopharmaceutical distribution 44 bioelectric 44 eyevis 44 Signaling Pathways 44 MT#P# 44 Carbon nanotube 44 Threat Detection 44 Picis Perioperative Dashboard 44 xCELLigence 44 Nokia iWin 44 Quantitative EEG 44 Patients Undergoing 44 Monocytes 44 Progenitor Cells 43 Hammadou 43 Inflammatory Pain 43 Assaying integrity 43 Recombinant Human 43 Head Mounted Displays 43 electromagnetic flowmeter 43 TechnologyTM 43 RNA Interference 43 antral 43 stereotactic radiotherapy 43 Telemetry MCOT 43 Masimo SET Pulse Oximetry 43 PD2i ® 43 near infrared fluorescence 43 Iron Deficiency 43 NovaBay Aganocide compounds 43 Novel Small Molecule 43 Molecular Pathogenesis 43 functional neuroimaging 43 Masimo Rainbow SET Pulse 43 myogenic 43 Patient Reported Outcomes 43 Interferometric 43 magnetoencephalography MEG 43 Trade Agreement ECOTA 43 hemoglobin hematocrit 43 electrode pads 43 SensL 43 iglucose 43 Electrocardiography 43 mediated inhibition 43 intraventricular 43 aberrometer 43 Circulating Tumor Cell 43 BrightView XCT 43 particle dispersion 43 Viscoelastic 43 transcutaneous 43 Smart Sensors 43 Tomography 43 Ligands 43 microplate instrumentation 43 DisplayLink USB graphics 43 CyberDisplay #K 43 Breast Tissue 43 #.#M pixel 43 Pancreas Cancer 43 psychophysiological 43 implantable devices 43 GeckoSavants 43 implantable biomedical 43 NESS L# 43 diode OLED display 43 Cervical Spine 43 neurophysiological monitoring 43 bioimaging 43 Heart Transplantation 43 Echocardiogram 43 nasal airflow 43 neuronal plasticity 43 Viral Infections 43 Neuroplasticity 43 Polymerase 43 nanofabrication techniques 43 Neuroanatomy 43 BrainGate Neural Interface 43 Deborah Estrin 43 Nervous System 43 hyperpolarization 43 STN DBS 43 GeckoImager ™ 43 nanotechnology MEMS 43 urodynamic studies 43 LADAR 43 photonic circuits 43 Hospitalized Patients 43 Therapy Reduces 43 Novel Mechanism 43 Ångström 43 Beta Amyloid 43 intracortical 43 Self Assembled 43 Angiogram 43 excitation wavelength 43 ECG waveforms 43 occipital lobes 43 PMMC Physician PRO 43 interregional cooperation 43 MPR# [001] 43 Progenitor Cell 43 Photonic Crystals 43 CTT Calmare 43 Total Knee Arthroplasty 43 Interventional Neurology 43 multiparameter 43 flow cytometric 43 BiPAP 43 CO Oximetry breakthrough 43 Abbey Chikane Zimbabwe 43 Anti Inflammatory Drugs 43 microfluidic chips 43 Oxidative 43 Dry Powder Inhalers 43 nanocomposite material 43 Smooth Muscle 43 Agreement BASA 43 electro optic modulator 43 Uric Acid 43 FDDNP 43 densitometry 43 cognitive affective 43 InnerCool endovascular 43 Grafts 43 breakthrough MRgFUS technology 43 nanomechanical 43 triple quadrupole mass spectrometer 43 photometers 43 Induced Pluripotent Stem Cells 43 cardiography 43 ictal 43 Omics 43 diagnostic modality 43 cortical stimulation 43 Electrocardiogram ECG 43 SmoothShapes XV 43 multiphoton imaging 43 Early Diagnosis 43 investment treaties BITs 43 Bilateral 43 Junichi Ushiba 43 Mouse Model 43 Brain Mapping 43 Histone 43 bioinformatic approaches 43 Flow cytometry 43 acupoints 43 Intracellular 43 ECG gated 43 Oxygenation 43 Elite KURO 43 Oxidase 43 Tissue Doppler 43 x ray detectors 43 Molecular imaging 42 exhaled nitric oxide 42 Leg Ulcers 42 micro fluidics 42 inferior parietal lobule 42 Infinity M# 42 nanotechnological 42 neurophysiologic 42 N#C HSA 42 radiotracer 42 licenses bioactive coatings 42 wavelet transform 42 Somatostatin 42 throughput mass spectrometry 42 Novel Therapeutic 42 Signaling Pathway 42 intraoperative imaging 42 motorized prosthetic 42 goniometer 42 nano optic 42 Brain Stimulation 42 TrueBeam STx 42 Autoimmune Disorders 42 noninvasively 42 Cytori Celution System 42 prefrontal regions 42 LabQuest 42 Tissue Transplantation 42 gold nanorod 42 computational algorithms 42 FreeStyle Lite blood glucose 42 videoscopes 42 Doppler ultrasound 42 x ray computed tomography 42 bio mimetic 42 Heart Rate Variability 42 Hansjorg Haber 42 Dilatation 42 ONVIF compliant 42 Capacitive touch 42 echo planar 42 neuroimaging studies 42 calorimetry 42 inertial sensor 42 Computed tomography CT 42 holographic telepresence 42 Intensity Modulated 42 miRNA expression 42 Al Abullah 42 Ascend magnets 42 Signalife Fidelity 42 plethysmography 42 LEXT 42 RF4CE 42 myocardial infarct size 42 ASEAN centrality 42 Pulse Oximeter 42 Spinal Disc 42 Attrius ® 42 florbetaben 42 Node Positive 42 PET positron emission tomography 42 Nd YAG lasers 42 myoelectric 42 sunlight readable LCD 42 Telemonitoring 42 qdots 42 ReliOn Ultima blood glucose 42 Institute ETRI 42 sampling oscilloscope 42 i LIMB Hand 42 piezoelectric sensors 42 dobutamine stress 42 SEMATECH FEP 42 VESA compliant 42 Skin Treatments 42 Tubulin 42 Systemic Delivery 42 orthostatic 42 Cell Transplants 42 ECLS 42 Oncogenic 42 Cardiorespiratory fitness 42 Neurotransmitter 42 renal agenesis 42 Technological Advances 42 Telehealth Monitor 42 quantitatively assess 42 Fluorescence 42 Biomolecules 42 Risk Stratification 42 Enlite Sensor 42 Prolongs Survival 42 SiMoA 42 transfer FRET 42 cerebral angiogram 42 GeneSightRx 42 autonomic nervous 42 Polar Electro 42 Risks Posed 42 MTM#A 42 mission Hansjorg Haber 42 recombinant spider silk 42 Phenotype 42 Gene Variation 42 NMR LipoProfile test 42 strangulations Summer Infant 42 phakic 42 STSS satellites 42 Visensia 42 Ebola Vaccine 42 Actuated 42 ultrasonographic examination 42 Morphologic 42 capnography monitoring 42 Functional magnetic resonance 42 technol 42 Transcutaneous 42 Epidermal 42 Bowel Disease 42 bioassays 42 protein biochip 42 cardiac perfusion 42 Brake Assist PLUS 42 bispectral index 42 holter 42 OTFT 42 Neuronal 42 fetal oxygen saturation 42 Studiophile 42 eTag assays 42 Cell Differentiation 42 LifeShirt System 42 multilateral frameworks 42 Extracellular 42 radiopharmaceutical distribution 42 neuropsychological assessment 42 TSQ Vantage 42 UPEK TouchChip 42 circadian rhythm sleep 42 neuromorphic 42 picosecond laser 42 Fibrinogen 42 IBM InfoSphere Streams 42 Arteris NoC 42 Diode OLED 42 Gene Variants 42 microelectrode 42 biomarker assay 42 microwave radiometer 42 echocardiographic 42 nanosensor 42 Envoy PDM 42 Dendritic Cells 42 ADXL# 42 evoked potentials 42 Functional Magnetic Resonance Imaging 42 noninvasive imaging 42 Bravo pH 42 ECOTECH 42 Azerbaijan Kazakhstan Kyrgyzstan 42 bacterial spore 42 Therapeutic Potential 42 MiniRAE 42 allopregnanolone 42 TGF beta signaling 42 brachial artery flow 42 ultrasound scanners 42 biomarker assays 42 medial temporal 42 Transcranial Magnetic Stimulation 42 Blocked Arteries 42 WSNs 42 optical biosensors 42 Randomized Evaluation 42 Fosshield 42 electroencephalogram EEG 42 EEG recordings 42 Genelec #A 42 QRAE II 42 Cognitive Problems 42 Ibis T# 42 proton MR spectroscopy 42 Dip Pen Nanolithography ® 42 P2X 42 pedicle screw fixation 42 ambulatory ECG 42 OSCE MG Co Chairs 42 multimodal biometrics 42 sensor node 42 interinstitutional 42 nanofluidics 42 Saclay France 42 trilateral mechanism 42 Patient Populations 42 superconducting quantum interference 42 Magnetic Nanoparticles 42 CMOS Image 42 microdevice 41 MMA#Q 41 Nerve Cells 41 Articular Cartilage 41 Etiology 41 Malignant Glioma 41 CAT scanners 41 electromyogram 41 inferior colliculus 41 Hysteresis 41 biological macromolecules 41 Surgery Performed 41 BSECO 41 electrocardiograph 41 microdebrider 41 ifm electronic 41 Dektak 41 biosensor 41 Small Molecule 41 anterior cortex 41 eNO 41 actionable situational awareness 41 neuroanatomical 41 hyperalgesia 41 Toshiba Aquilion ONE 41 flexible OLED displays 41 Khalaf Khalafov 41 VFS# 41 interparliamentary cooperation 41 noninvasive gene expression 41 neurophysiological 41 silicon nitride ceramic 41 ATTENTION ASSIST 41 mechanical dyssynchrony 41 venography 41 cortical activation 41 ifm 41 interobserver 41 Lymphocyte 41 Aptamer 41 Menstrual Pain 41 Nerve Regeneration 41 Artis zeego 41 Intellitag 41 spectroscopic imaging 41 Positron emission tomography PET 41 electromyographic 41 proteomics genomics 41 functional MRI fMRI 41 cochlear implantation 41 absorption spectra 41 EtCO2 41 photon emission 41 coronary computed tomography 41 QTc 41 Endovascular Treatment 41 chlorophyll fluorescence 41 multifunctional nanoparticles 41 Liquavista displays 41 QTc interval 41 Discovery CT# HD 41 Radiation Induced 41 LINX AUDIO 41 radionuclide bone 41 AIDC technologies 41 biochips 41 nanoelectromechanical systems 41 PillCam capsules 41 computerized tomography CT 41 Peripheral Blood 41 Nano Scale 41 Protein Structure 41 vermis 41 silicon micromachined 41 Autologous 41 Epithelial 41 VideoMate 41 microsensors 41 Gas Analyzers 41 occipital regions 41 stochastic resonance 41 biosensors 41 LCD TVs projectors 41 Toshiba EasyGuard 41 Silicon Germanium 41 orbitofrontal 41 checkup Phipps 41 ICS G2 41 Reduces Mortality 41 Raman spectra 41 Radianse Reveal 41 chroma keying respectively 41 Electronic brakeforce distribution 41 flow cytometer 41 metabolomic 41 A1CNow + 41 GPi 41 RQ PCR 41 electroretinography 41 Prognostic Factors 41 Solid Tumours 41 tomograph 41 epidural stimulation 41 Fortify Defender 41 Plasticity 41 Tumor Suppressor Gene 41 MONITORING 41 active RFID RTLS 41 Immune Cell 41 electrocardiogram EKG 41 electrocardiograph ECG 41 Mesenchymal Stem Cells 41 HKSaddler Magic Man 41 Xtrinsic 41 biochemical profiling 41 Brain Machine Interface 41 Adjuvant Therapy 41 Secretory 41 devices incorporating Signalife 41 SEMG 41 GaN transistors 41 CIBIC + 41 triaxial accelerometer 41 Laryngeal Cancer 41 Attrius ™ 41 medial frontal cortex 41 Augmented reality AR 41 ClinProt 41 CardioPET 41 SQUIDs 41 Rosetta Elucidator 41 Insulin Resistance 41 BACcel 41 electromotive force 41 positron emission topography 41 electroencephalograms EEGs 41 morphologic characteristics 41 Mahru Z 41 x ray absorptiometry DEXA 41 Sonamba 41 Cerebrospinal Fluid 41 theta rhythm 41 ECG Electrocardiogram 41 gene expression assays 41 Stress Induced 41 Operational Guidelines 41 diffusion MRI 41 hemoglobin A1C HbA1C 41 Mammalian 41 Receptor Signaling 41 cardiac autonomic 41 Inc. NASDAQ ASPM 41 MEMS microelectromechanical systems 41 ECG electrocardiogram