Antitumor activities of interferon alpha, beta, and gamma and their combinations on human melanoma cells in vitro: changes of proliferation, melanin synthesis, and immunophenotype. - Garbe,C.; Krasagakis,K.; Zouboulis,C.C.; Schröder,K.; Krüger,S.; Stadler,R.; Orfanos,C.E. (J Invest Dermatol, 1990)