Related by context. Frequent words. (Click for all words.) 69 multifactorial 61 potentially modifiable 59 aetiology 58 biopsychosocial 57 chronic relapsing 56 chronicity 55 etiology 55 Chronic inflammation 54 genetic determinants 53 Diabetes mellitus 53 nonadherence 53 Pulmonary hypertension 53 morbidity mortality 52 Lactose intolerance 52 valvular heart 52 modifiable risk 51 metabolic abnormalities 51 elevated CRP 51 genetic susceptibility 50 mortality morbidity 50 Misdiagnosis 50 Periodontitis 50 underrecognized 50 symptomatology 50 atherothrombosis 50 pathophysiological 50 Acid reflux 50 thyroid dysfunction 49 epidemiologically 49 neurobiological 49 coagulopathy 49 Irritable bowel syndrome 49 remediable 49 overdiagnosis 49 Hypoglycemia 49 psychogenic 49 hyperinsulinemia 49 susceptibility gene 49 comorbidity 49 Chlamydia pneumoniae 49 causative factors 49 predisposing factors 49 cardio vascular disease 49 lipid abnormalities 49 genetic predisposition 49 Toxoplasmosis 49 causative agents 48 Susceptibility 48 Diagnosing 48 Undiagnosed 48 biologically plausible 48 genetic polymorphisms 48 prognostic marker 48 thyroid nodules 48 obstructive lung 48 pharmacological interventions 48 neuroinflammation 48 underdiagnosed 48 therapeutic modality 48 Insulin resistance 48 pericardial effusion 47 Periodontal disease 47 determinants 47 undertreated 47 causative agent 47 iatrogenic 47 somatic symptoms 47 asthma exacerbations 47 neurologic symptoms 47 prognostic significance 47 comorbid 47 Severity 47 Sleepiness 47 metabolic acidosis 47 prodromal 47 hyperglycaemia 46 Oxidative stress 46 polypharmacy 46 disc degeneration 46 postpartum hemorrhage 46 etiologies 46 electrolyte imbalances 46 nutrient deficiency 46 causative 46 psychotherapies 46 causal 46 untreated sleep apnea 46 dysregulation 46 neuropathological 46 dietary interventions 46 comorbid conditions 46 Inflammatory bowel disease 46 Metabolic syndrome 46 causative factor 46 mechanistically 46 Chronic fatigue 46 Chronic obstructive pulmonary 46 Pre eclampsia 45 differential diagnosis 45 pathophysiology 45 covariate