Lolapps 6waves will be the first of its size in the social gaming space with a developer-publisher combination, says Sethi, likening it to the model of Valve Corp.

FORBES: Lolapps Merges With 6Waves In Social Gaming Developer-Publisher Tie-Up

Drugs that stimulate the next subtype, the 5-HT2B receptor, have been associated with heart valve disease, the major reason for withdrawal of the fenfluramine part of the fen-phen weight loss combination drug.

FORBES: Why Does Arena's Obesity Drug Have Abuse Potential?