3308454 PVAP polyvinyl acetate phthalate 19 3308447 PVAP possible ventilator-associated pneumonia 13 3308457 PVAP possible VAP 3 3308452 PVAP polyvinyl alcohol phosphate ester 2 3308450 PVAP pediatric ventilator-associated pneumonia according to proposed criteria 1 3308453 PVAP polyvinyl alcohol latex powder 1 3308451 PVAP Price-Volume Agreement Program 1 3308458 PVAP probable VAP 1