What are the four methods of diagnosis (診断)?

Oriental medicine diagnosis traditionally consists of four different methods. There are: 

Bo Shin (望診) - diagnosis by first impression and observation of the patient, without close examination. 

Bun Shin (聞診)diagnosis by listening to the character and quality of sounds. Any odor which you happen to smell is also considered a part of this diagnosis. 

Mon Shin (問診- diagnosis by questioning. Ask questions about the patient's condition, directly or by questionnaire, Find out where the pain exists and inquire into what may have happened to cause their condition. This would include health history and other health concerns. 

Setsu Shin (切診) - diagnosis by examining the body.