@article{55aaaabe8c6540ae9125135720abbe6d,
title = "Sildenafil citrate and blood-pressure-lowering drugs: results of drug interaction studies with an organic nitrate and a calcium antagonist",
author = "Webb, \{David J\} and Stephen Freestone and Allen, \{Michael J\} and Muirhead, \{Gary J\}",
year = "1999",
month = mar,
day = "4",
doi = "10.1016/S0002-9149(99)00044-2",
language = "English",
volume = "83",
pages = "21--28",
journal = "American Journal of Cardiology",
issn = "0002-9149",
publisher = "Elsevier",
number = "5",
}