What do residents carry in their lab coats?

From CasesBlog:

The study was done in Ireland in 2001 and a lot of things have changed since then:

- Mean weight carried was 1.63 Kg

- Interns and senior house officers (SHOs) carried significantly more than registrars.

- Medical specialties carried significantly more than surgical specialties.

References:
Junior hospital doctors: a weighty issue. Hone S, Mackle T, Keogh I, Colreavy M, Walsh M. Ir Med J. 2001 Jul-Aug;94(7):208, 210.
Image source: Lab coat and scrubs. Wikipedia, Samir, Creative Commons Attribution-ShareAlike 3.0 License.