"The way in which "Tam o' Shanter" is represented in text shows a wide range of forms in the medical (and lay) literature. The form used in this article was that used by Robert Burns in the poem of the titular character of the same name and is also that in Chambers Dictionary, one of the authoritative references on the English language 3. As it is a proper noun, it should be capitalised, although as per Burns, the 'o' remains in lower case. Some articles insert a space between the 'o' and 'Shanter', others do not. Moreover, some sources, including at least one established dictionary, insert multiple hyphens, resulting in the somewhat quirky Tam-o' -Shanter or Tam-o'-Shanter sign 2,4."