Lung Function and Symptoms of Exposure to the Volcanic Eruption in the Canary Islands: First Follow-Up of the ASHES Study Cristina Candal-Pedreira; David Díaz-Pérez; Valle Velasco; Ciro Casanova; Orlando Acosta; Germán Peces-Barba; Esther Barreiro; Ana Cañas; Argelia Castaño; María Jesús Cruz Carmona; Carmen Diego; Judith Garcia-Aymerich; Cristina Martínez; María Molina-Molina; Xavier Muñoz; Francisco Javier Sánchez-Íñigo; Alberto Ruano-Ravina;