1990 First chemoprevention trial to show efficacy - vitamin A analogue against mouth and throat tumors.
1990 First chemoprevention trial to show efficacy - vitamin A analogue against mouth and throat tumors.
1990年,首个化学预防试验显示效果-维生素A类似物预防口腔和喉肿瘤.
1990 First chemoprevention trial to show efficacy - vitamin A analogue against mouth and throat tumors.
1990年,首个化学预防试验显示效果-维生素A类似物预防口腔和喉肿瘤.