original_query: What is the purpose of the proof-of-mechanism trial for JNJ-67953964 (previously LY2456302)?
query: What is the purpose of the proof-of-mechanism trial for JNJ-67953964 (previously LY2456302)?
answer: The proof-of-mechanism trial for JNJ-67953964 evaluated its potential for treating anhedonia in patients with anhedonia and a mood or anxiety disorder.