Response to: Comment on "Intervention Effects of a School-Based Health Promotion Programme on Obesity Related Behavioural Outcomes" - Susanne Kobel; Tamara Wirt; Anja Schreiber; Dorothea Kesztyüs; Sarah Kettner; Nanette Erkelenz; Olivia Wartha; Jürgen M. Steinacker (Hindawi Limited, 2015)