The gastric bypass operation, also known as stomach stapling, has become the most common surgical procedure for treating obesity.
Gastric bypass operations and stomach stapling are different operations.
( z1 differ :ARG1 ( z2 operation :mod ( z3 bypass :mod ( z4 gastric ) ) ) :ARG2 ( z5 operation :mod ( z6 stapling :ARG1 ( z7 stomach ) ) ) )