TY  - GEN
AU  - Adolph,R J
TI  - The fourth heart sound
SN  - 0012-3692
PY  - 1999///0614
KW  - Heart Diseases
KW  - diagnosis
KW  - Heart Sounds
KW  - Humans
N1  - Publication Type: Comment; Letter
UR  - https://doi.org/10.1378/chest.115.5.1480-a
ER  -