Exposure to second-hand smoke and direct healthcare costs in children – results from two German birth cohorts, GINIplus and LISAplus
Ariane Batscheider, Sylwia Zakrzewska, Joachim Heinrich, Christina M Teuner*, Petra Menn, Carl P Bauer, Ute Hoffmann, Sibylle Koletzko, Irina Lehmann, Olf Herbarth, Andrea von Berg, Dietrich Berdel, Ursula Krämer, Beate Schaaf, H-Erich Wichmann, Reiner Leidl and the GINIplus and LISAplus study groups