Scientific methods for determining truth differ from judicialmethods. Scientists confer, develop theories, and then testtheir theories by performing data-based research. If importantfindings appear to be inconsistent with the prevailing theory,the theory may be altered. It is often necessary to accumulatedata from multiple studies and disciplines in order to understandthe causes of disease and develop effective treatments. At theheart of these activities are collaboration, consultation, andcommunication of research findings. A scientific consensus onthe relation between potentially causal factors and diseasearises from the preponderance of data reported in the literature.