SERPINA5 and myalgic encephalomeyelitis/chronic fatigue syndrome: In the ME/CFS group, Serpin Family A Member 5 (SERPINA5) was positively correlated with General Health (r = 0.646, q = 0.004) and Social Functioning (r = 0.593, q = 0.027) from the SF-36 questionnaire (Fig. 7b).