TY - GEN AU - Luisada,A A AU - Argano,B TI - Triplication and quadruplication of the second sound SN - 0012-3692 PY - 1971///0406 KW - Adult KW - Aged KW - Bundle-Branch Block KW - diagnosis KW - Child KW - Humans N1 - Publication Type: Journal Article UR - https://doi.org/10.1378/chest.59.3.316 ER -