Giovanni Filippo Ingrassia: head and shoulders in oval. Istituto Nazionale Medico Farmacologico "Serono", Roma.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Giovanni Filippo Ingrassia: head and shoulders in oval. Istituto Nazionale Medico Farmacologico "Serono", Roma. Wellcome Collection. Source: Wellcome Collection.