Fewer than 300 people in the study had gastric bypass surgery, a more dramatic technique in which the surgeon creates a golf-ball-shaped pouch to curb food intake.
The Hibs team has beefed up considerably since manager Colin Calderwood re-shaped his squad in January but the visitors were bullied off the ball throughout a first half bereft of thrills.
Research by the USGA has shown that U-shaped grooves allow top players to generate much more spin when playing the ball out of the rough, making the ball come to a quick stop on the green.