[1] Univ Munich, Clin Small Anim Med, Ctr Clin Vet Med, D-80539 Munich, Germany
[2] Anim Dermatol Clin, Tustin, CA 92780 USA
[3] Chiltern Referral Serv, Clin Derm4Pets, Chalfont St Giles HP8 4AB, Bucks, England
[4] Univ Munich, Clin Ruminants, Ctr Clin Vet Med, D-85764 Oberschleissheim, Germany