TY - RPRT TI - Development of computerized storage facilities for twin data: a relational database system for a twin register. AU - A M Macdonald AU - S A Hamer PY - 1997 DO - 10.1023/a:1025655023496 UR - https://pubmed.ncbi.nlm.nih.gov/9145539/ ID - 9145539 ER -