Split up your study into several publications and you’ll give the impression that there’s stronger support for the efficacy of your drug than if there were just one or two papers published on it. It’s a devious, but probably effective, tactic: busy doctors who see that there are six papers claiming support for one drug and only one paper for another might be more likely to prescribe the former, without necessarily noticing that the six papers on it are all sliced-up reports of the same study.