TY  - RPRT
TI  - Letter: E-F slope without "a" wave.
AU  - J A Levisman
PY  - 1976
DO  - 10.1161/01.cir.53.4.744
UR  - https://pubmed.ncbi.nlm.nih.gov/1253401/
ID  - 1253401
ER  -