The baseline examinations of the German National Cohort (NAKO): recruitment protocol, response, and weighting - Rach, Stefan; Sand, Matthias; Reineke, Achim; Becher, Heiko; Greiser, Karin Halina; Wolf, Kathrin; Wirkner, Kerstin; Schmidt, Carsten Oliver; Schipf, Sabine; Jöckel, Karl-Heinz; Krist, Lilian; Ahrens, Wolfgang; et al. (European journal of epidemiology, 2025)