Andreas Ziegler, Inke R. Koenig: A Statistical Introduction to Genetic Epidemiology , 2010. Wiley.
Veier?d MB, Lydersen S, Laake P (eds.): Medical statistics in clinical and epidemiological research. Gyldendal akademisk, 2012 (www.medicalstatistics.no). This book is used as a course book in several of the PhD courses and chapter 18 is useful for this course.