TY - RPRT TI - Genetic studies of complement C4 in man. AU - G B Petersen AU - I J Sørensen AU - L Buskjaer AU - L U Lamm PY - 1979 DO - 10.1007/bf00289447 UR - https://pubmed.ncbi.nlm.nih.gov/535900/ ID - 535900 ER -