English: Thomas Turlay Mackie in 1946. At the time, he was the Professor of Preventative Medicine at the Bowman Gray School of Medicine, Winston Salem, NC
Date
Source
Emailed copy from Wake Forest School of Medicine, North Carolina
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.