Footnote 47:

familiarem sanguinem, Galen’s oi)kei=on ai=(ma, blood appropriate for each organ: “Of the bodily fluids, blood is the most useful and familiar” ( De temperamentis 1.603.8-9, cf. De elem. ex Hipp. 1.506.6; De locis affectis 8.409.5ff.; De simplicium med. temp. ac fac 11.616.9; In Hipp. lib. iii epid. comm. 17a.534.15.