Dr. John Walker SmythBr Med J 1917; 1 doi: http://dx.doi.org/10.1136/bmj.1.2925.107-a (Published 20 January 1917) Cite this as: Br Med J 1917;1:107
Log in using your username and password
Log in through your institution
Register for a free trial to thebmj.com to receive unlimited access to all content on thebmj.com for 14 days.
Sign up for a free trial