00484nam a22001697a 4500020001800000082001500018100002100033245005200054250001200106260003900118300001300157524005300170654002500223654002300248700002100271700002200292  a9783030208110  a616.2bKHU  aKhurana, Sandhya  aDifficult to treat asthma : clinical essentials  a1st ed.  aSwitzerlandbSpringer Naturec2020  a1-334 p.  aDr.Jobin Jose, Dept. of Emergency Medicine, AIMS  aRespiratory Medicine  aEmergency Medicine  aKhurana, Sandhya  aHolguin, Fernando