Arm, J.P., O'Hickey, S.P., ea., 1990

Arm, J.P., O'Hickey, S.P., Hawksworth, R.J., Fong, C.Y., Crea, A.E., Spur, B.W., and Lee, Т.Н. (1990) Am. Rev. Resp. Dis., 142, 1112-1118.

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