00327nas a2200121   4500000000100000008004100001100001400042700001200056700001100068700001500079700001000094245010100104       2018                            d1 aHackett M1 aBadve M1 aZhou Z1 aAnderson C1 avan d00aFrequency of post-stroke pneumonia: Systematic review and meta-analysis of observational studies