TY - RPRT TI - Use of general practitioner computerised records to create a population based twin sample: pilot study based on Parkinson's disease. AU - C H Hawkes AU - A M Macdonald AU - A H Schapira PY - 1997 DO - 10.1136/bmj.315.7121.1510 UR - https://pubmed.ncbi.nlm.nih.gov/9420494/ ID - 9420494 ER -