TY  - RPRT
TI  - Incentive spirometry: its value after cardiac surgery.
AU  - G D Gale
AU  - D E Sanders
PY  - 1980
DO  - 10.1007/bf03007047
UR  - https://pubmed.ncbi.nlm.nih.gov/7004598/
ID  - 7004598
ER  -