#1	MeSH descriptor Heart Valve Prosthesis Implantation explode all trees	397
#2	((aorta or aortic) adj2 (replace* or implant* or prosthe* or bioprosthe* or transplant*))	22
#3	(aorta or aortic) adj2 (replace* or implant* or prosthe* or bioprosthe* or transplant*)	22
#4	(avr)	90
#5	(#1 OR #2 OR #3 OR #4)	475
#6	MeSH descriptor Aortic Valve Stenosis explode all trees	323
#7	((supravalvular or subvalvular or aort*) adj2 stenos?s)	10
#8	(#6 OR #7)	333
#9	MeSH descriptor Surgical Procedures, Minimally Invasive explode all trees	18554
#10	(transcatheter* or trans-catheter* or transfemoral or trans-femoral or transapical or trans-apicalor percutaneous)	7036
#11	(minimal* adj3 (surgery or surgeries or surgical or procedure* or invasive))	406
#12	(#9 OR #10 OR #11)	23199
#13	(#5 AND #8 AND #12)	34
#14	core-valve or corevalve or Cribier-Edwards or Edwards-Sapien or TAVI	19
#15	(#13 OR #14)	43
#16	(#13 OR #14), from 2011 to 2012	23