## Abstract We investigated whether the use of calcium channel blockers (CCBs) was associated with a reduced risk of Parkinson's disease (PD) in two large prospective cohorts: the Nurses' Health Study (NHS) and Health Professionals' FollowโUp Study (HPFS). Cox proportional hazards models were used
Brain extraction of a calcium channel blocker
โ Scribed by Dr. James C. Grotta; L. Creed Pettigrew; Alan H. Lockwood; Catherine Reich
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 459 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0364-5134
No coin nor oath required. For personal study only.
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## Purpose: To review conceptual issues regarding confounding by indication in the context of studies of calcium channel blockers (ccbs). ## Methods: Review of literature, with special attention to two articles in the current issue. ## Results: Conflicting arguments about the presence of uncont