APA

Ben-Shlomo Y., Churchyard A., Head J., Hurwitz B., Overstall P., Ockelford J. & Lees A. J. (19980513). Investigation by Parkinson's Disease Research Group of United Kingdom into excess mortality seen with combined levodopa and selegiline treatment in patients with early, mild Parkinson's disease: further results of randomised trial and confidential inquiry. : BMJ (Clinical research ed.).

Chicago

Ben-Shlomo Y, Churchyard A, Head J, Hurwitz B, Overstall P, Ockelford J and Lees A J. 19980513. Investigation by Parkinson's Disease Research Group of United Kingdom into excess mortality seen with combined levodopa and selegiline treatment in patients with early, mild Parkinson's disease: further results of randomised trial and confidential inquiry. : BMJ (Clinical research ed.).

Harvard

Ben-Shlomo Y., Churchyard A., Head J., Hurwitz B., Overstall P., Ockelford J. and Lees A. J. (19980513). Investigation by Parkinson's Disease Research Group of United Kingdom into excess mortality seen with combined levodopa and selegiline treatment in patients with early, mild Parkinson's disease: further results of randomised trial and confidential inquiry. : BMJ (Clinical research ed.).

MLA

Ben-Shlomo Y, Churchyard A, Head J, Hurwitz B, Overstall P, Ockelford J and Lees A J. Investigation by Parkinson's Disease Research Group of United Kingdom into excess mortality seen with combined levodopa and selegiline treatment in patients with early, mild Parkinson's disease: further results of randomised trial and confidential inquiry. : BMJ (Clinical research ed.). 19980513.