1. Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, Virginia, USA
2. Department of Statistics, Ankara University, Ankara, Turkey
3. Department of Actuarial Science, Selcuk University, Konya, Turkey
4. Department of Statistics, Selcuk University, Konya, Turkey
5. Department of Mathematical Sciences, Bentley University, Waltham, Massachusetts, USA
6. College of Public Health, The Ohio State University, Columbus, Ohio, USA