This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Gate control theory was proposed by 
Select and explain. 
A. Lofgren, B. Melzack and Wall, C. Alexander Beunet, D. William Halsted
B: Melzack and Wall
Answer: B: Melzack and Wall 
Explanation: None