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2. Royal Free epidemic;CROWLEY, N.; NELSON, M.; STOVIN, S.;Journal of Hygiene. Cambridge,1957
3. Royal Free epidemic of 1955: a reconsideration;MCEVEDY, C.P.; BEARD, A.W.;British Medical Journal,1970
4. Concept of benign myalgic encephalomyelitis;MCEVEDY, C.P.; BEARD, A.W.;British Medical Journal,1970
5. OF THE ROYAL FREE HOSPITAL;STAFF, M.E.D.I.C.A.L.,1957