Critical age windows in the impact of lifetime smoking exposure on respiratory symptoms and disease among ever smokers

Bircan Erbas, Toril Morkve Knudsen, Christer Janson, Roy M Nilsen, Simone Accordini, Bryndis Benediktdottir, Julia Dratva, Joachim Heinrich, Debbie Jarvis, Benedcite Leynaert, Melanie C Matheson, Dan Norback, Francisco G Real, Chantal Raherison-Semjen, Simona Villani, SC Dharmage, C Svanes