#1	MeSH DESCRIPTOR Pulmonary Disease, Chronic Obstructive Explode All
#2	MeSH DESCRIPTOR Bronchitis, Chronic
#3	(obstruct*) near3 (pulmonary or lung* or airway* or airflow* or bronch* or respirat*)
#4	COPD:MISC1
#5	(COPD OR COAD OR COBD OR AECOPD):TI,AB,KW
#6	#1 OR #2 OR #3 OR #4 OR #5
#7	MESH DESCRIPTOR Proton Pump Inhibitors EXPLODE ALL
#8	Proton Pump Inhibitor* or "Proton‐Pump Inhibitor*" or PPI or PPIs
#9	lansoprazole
#10	omeprazole
#11	pantoprazole
#12	rabeprazole
#13	esomeprazole
#14	dexlansoprazole
#15	vonoprazan
#16	MESH DESCRIPTOR Gastroesophageal Reflux EXPLODE ALL
#17	MESH DESCRIPTOR Laryngopharyngeal Reflux EXPLODE ALL
#18	((gastroesophageal or gastro‐esophageal or gastro‐oesophageal or gastrooesophageal) NEAR3 reflux)
#19	GERD or GORD
#20	acid NEAR2 reflux
#21	heartburn or pyrosis
#22	{OR #7‐#21}
#23	#22 AND #6