title: [Efficacy of phlegm removal by abdominal breathing during asthmatic attacks].
mesh_terms: D000005:Abdomen; D000293:Adolescent; D001249:Asthma / Q000451:nursing*; D001945:Breathing Exercises; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D013183:Sputum