Chen, Jowei;
Smith, Jennifer Ann; Kardia, Sharon R.; Ko, Y; Mukherjee, B; Park, S; Allison, M; Vokonas, P; Diez-Roux, A. (2014).
Testing departure from additivity in Tukey's model using shrinkage: application to a longitudinal setting. Statistics in Medicine. 33(29), 5177-5191.