A G Messenger, E G Knox, R Summerly, H L Muston, E Ilderton
Messenger A G, Knox E G, Summerly R, Muston H L, Ilderton E.
Case clustering in pityriasis rosea: support for role of an infective agent.
Br Med J (Clin Res Ed) 1982; 284 :371
doi:10.1136/bmj.284.6313.371