Caduceus as a symbol of medicine emblem of the physician [...] it is most unfortunate that the 'confusion' exists." In an anonymous rebuttal contained in a letter to the editor published three months later in "The Military Surgeon" it was claimed that the late Col. John R. van Hoff was a member of the board that selected the emblem ("if he was not the one who was chiefly instrumental in its adoption"). In the letter to the editor reproduced by Emerson, the anonymous author claims According to this view the caduceus was not intended to be a medical symbol (and, though explained differently, this reflects the
Caduceus as a symbol of medicine ancient and authentic claim to be the emblem of medicine". Most attempts to defend its use in a medical context date from the last quarter of the 19th century through the first quarter of the 20th, and have been characterized as "based on flimsy and pseudo-historical research". In a survey of 242 logos used by organizations related to health or medicine, Friedlander found that professional associations were more likely to display the rod of Asclepius (62%), while organizations with a commercial focus were more likely to use the caduceus (76%). Hospitals were an exception (37% used a staff of Asclepius