RT Journal A1 Weaver DC T1 LIquid air JF JAMA JO JAMA YR 1989 FD February 24 VO 261 IS 8 SP 1192 OP 1192 DO 10.1001/jama.1989.03420080112044 UL http://dx.doi.org/10.1001/jama.1989.03420080112044 AB