RT Journal Article SR Electronic T1 Observations with SPECT on the Normal Regional Distribution of Pulmonary Blood Flow in Gravity Independent Planes JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1758 OP 1762 VO 28 IS 11 A1 Robert Lisbona A1 Geoffrey W. Dean A1 Tawfic S. Hakim YR 1987 UL http://jnm.snmjournals.org/content/28/11/1758.abstract AB