Probably originating about 1160, the Regimen sanitatis from the medical school at Salerno (where medicine was first treated as a separate science) had greater popular influence than virtually any other medieval medical tract. This collection of very sensible dietary and hygienic precepts was first printed with the famed commentary on the Regimen by Arnald of Villanova. The citation (ISTC no. ir00061000) is one of six undated editions, of which four were issued by Johannes de Westfalia. All were probably printed around 1480-85; no order of priority can be definitely established. English translation by Thomas Paynel, [London, 1535]. See Nos. 49-51. Digital facsimile of the edition printed between 1477 and 1483 from the Universitäts- und Landesbibliothek Düsseldorf at this link.