[The riddle of asthma].
D001249:Asthma / Q000139:chemically induced*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009883:Ophthalmic Solutions; D013999:Timolol / Q000009:adverse effects*
D009883:Ophthalmic Solutions; D013999:Timolol
Astman arvoitus.