Legionnaires' disease in travellers to Spain.
D000368:Aged; D016000:Cluster Analysis; D005260:Female; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology / Q000635:transmission*; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D013030:Spain / Q000453:epidemiology; D014195:Travel