John Smith & Associates

From Tardis Wiki, the free Doctor Who reference
The organisation's name printed on the side of a stethoscope box. (TV: The Wheel in Space)

John Smith & Associates was printed on the side of Gemma Corwyn's stethoscope box in 2079. When asked to give the Second Doctor's name, he used this as inspiration for the alias "John Smith". (TV: The Wheel in Space)