![]() | Analysis of Health Surveys EDWARD L. KORN, PhD, is head of the Clinical Trials Section,Biometric Research Branch, at the National Cancer Institute. BARRY I. GRAUBARD, PhD, is a senior investigator in theBiostatistics Branch at the National Cancer Institute. |
![hidden image for function call](https://upload.wikimedia.org/wikipedia/commons/c/ca/1x1.png)