by Dimitrakov, Dimitar J, Nikolov, Dimitar G, Dimitrakov, Jordan D, Despotov, Toma B, Kumchev, Emil P, Tzvetkova, Zdravka S, Tilkian, Edward E, Pandeva, Stefka M, Chatalbasheva, Dora L, Tzekov, Valeri D, Anavi, Beniamin L
Published in Folia medica (Plovdiv) (2004)