On widths of margins in excision of primary malignant melanomas. Ethics of randomized trials of wide and narrow margins.
D002986:Clinical Trials as Topic; D004992:Ethics, Medical; D006801:Humans; D008545:Melanoma / Q000401:mortality / Q000601:surgery*; D008722:Methods; D011897:Random Allocation; D012878:Skin Neoplasms / Q000401:mortality / Q000601:surgery*