AU - Özgültekin, Asu TI - Preoxygenation in the Elderly: Comparison of 3-min and Four Deep Breath Techniques PT - Journal Article DP - 2019 TA - Haydarpasa Numune Med J PG - 8-12 VI - 59 IP - 1 AID - 10.14744/hnhj.2018.72677 [doi] 4100 - https://dx.doi.org/10.14744/hnhj.2018.72677 SO - HAYDARPAŞA NUMUNE MEDICAL JOURNAL, 2019 59(1):8