TY - RPRT TI - Multiple primary squamous cell carcinomas in the upper digestive tract. AU - P J Fitzpatrick AU - B S Tepperman AU - G deBoer PY - 1984 DO - 10.1016/0360-3016(84)90233-5 UR - https://pubmed.ncbi.nlm.nih.gov/6511524/ ID - 6511524 ER -