National health and nutrition examination survey 1999-2000: effect of observer training and protocol standardization on reducing blood pressure measurement error
| Autor: | Ostchega, Yechiam, Prineas, Ronald J, Paulose-Ram, Ryne, Grim, Carlene M, Willard, Grace, Collins, Doreen |
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| Zdroj: | In Journal of Clinical Epidemiology August 2003 56(8):768-774 |
| Databáze: | ScienceDirect |
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