Randomised controlled trial and economic evaluation of podophyllotoxin solution, podophyllotoxin cream, and podophyllin in the treatment of genital warts.
Lacey CJ, Goodall RL, Tennvall GR, Maw R, Kinghorn GR, Fisk PG, Barton S, Byren I, Perstop Pharma Genital Warts Clinical Trial Group. Sex Transm Infect. 2003 Aug; 79(4):270-5.