Background and main text Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is
a complex and controversial clinical condition without having established causative factors …

Among the many patients who seek medical care for the complaint of fatigue, a small
number suffer from chronic fatigue syndrome (CFS). CFS is a poorly understood condition …

Chronic fatigue syndrome (CFS) is a debilitating disease of unknown etiology that is
estimated to affect 17 million people worldwide. Studying peripheral blood mononuclear …

Background In October 2009 it was reported that 68 of 101 patients with chronic fatigue
syndrome (CFS) in the US were infected with a novel gamma retrovirus, xenotropic murine …

Foamy viruses (FV) are complex retroviruses which are widespread in many species.
Despite being discovered over 40 years ago, FV are among the least well characterized …

We set out to determine the relation between a general practitioner (GP) diagnosis of viral
illness and development of chronic fatigue 6 months later. 618 subjects who attended GPs …

Fatigue is a common complaint in primary care settings,* reported by at least 20% of patients
seeking medical care. Likewise, large community surveys indicate that up to half of the …

Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) and Cancer-Related
Fatigue (CRF) are syndromes with considerable overlap with respect to symptoms. There …

The chronic fatigue syndrome has become the fin de siècle illness, now getting similar
attention to that of neurasthenia, which dominated medical thinking at the turn of the century …

Virtually all nonhuman primate species investigated thus far including prosimians, New
World and Old World monkeys and apes all harbor distinct and species-specific clades of …