海量图书期刊资源，随时随地畅享阅读乐趣
Vaccination and melanoma riskAnnette Pfahlberg; Ivan N. Botev; Klaus F. Kölmel; Olaf Gefeller · 2002
Metastatic signet-ring cell melanomaBotev, Ivan N. · 1993
Giant congenital cellular blue naevus of the scalp and craniumIvan N. Botev · 1998