TY - RPRT TI - Letter: Serum alpha-fetoprotein in cystic fibrosis. AU - G Knopple AU - H W Rotthauwe AU - F G Lehmann PY - 1975 DO - 10.1136/bmj.4.5994.459-a UR - https://pubmed.ncbi.nlm.nih.gov/53087/ ID - 53087 ER -