About the Authors
- John M. Lachin
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* E-mail: jml@bsc.gwu.edu
Affiliation The Biostatistics Center, The George Washington University, Rockville, Maryland, United States of America
Competing Interests
The author has declared that no competing interests exist.
Author Contributions
Conceived and designed the methodological research: JML. Analyzed the data: JML. Wrote the paper: JML.