Case clustering in pityriasis rosea: support for role of an infective agent.Br Med J (Clin Res Ed) 1982; 284 doi: https://doi.org/10.1136/bmj.284.6327.1478-a (Published 15 May 1982) Cite this as: Br Med J (Clin Res Ed) 1982;284:1478
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