TY - GEN AU - de Vries,N AU - Maier,H AU - Snow,G B TI - [(Chemo-) prevention of second tumors in patients with head and neck neoplasms] SN - 0017-6192 PY - 1990///0913 KW - Carotenoids KW - administration & dosage KW - Head and Neck Neoplasms KW - prevention & control KW - Humans KW - Neoplasms, Multiple Primary KW - Retinoids KW - Risk Factors N1 - Publication Type: English Abstract; Journal Article; Review ER -