<https://pubs.asahq.org/anesthesiology/article/67/3/A543/45446/SUBANESTHETIC-CONCENTRATIONS-OF-HALOTHANE-AND>
<http://schema.org/url>
<https://dx.doi.org/10.1097/00000542-198709001-00543>
<https://pubs.asahq.org/anesthesiology/article/67/3/A543/45446/SUBANESTHETIC-CONCENTRATIONS-OF-HALOTHANE-AND>