Jaakko Nevalainen received the MSc degree in mathematical statistics from the University of Jyväskylä, in 1998 and the PhD degree in statistics from the University of Tampere, Finland, in 2007. His theoretical research has mainly been on the framework of analyzing clustered, multivariate data by nonparametric means and with possibly informative cluster size. In addition, he has been involved in collaborative research in several large longitudinal studies on, e.g., diabetes, prostate cancer, and nutrition, as well as in research making use of new technologies like multicellular imaging and mass spectrometry. Currently, he is a professor of biostatistics with the University of Tampere, Finland.