Nitrous oxide for pain management of first-trimester surgical abortion: a randomized controlled trial
2012 ◽
Vol 86
(2)
◽
pp. 157-162
◽
Keyword(s):
2017 ◽
Vol 95
(3)
◽
pp. 239-244
◽
Keyword(s):
2015 ◽
Vol 212
(1)
◽
pp. 45.e1-45.e6
◽
Keyword(s):
2020 ◽
Vol 223
(6)
◽
pp. 884.e1-884.e10