As per SEC filings, PatientsLikeMe in Cambridge, MA has added another $3M to a previous round of funding back in August. PatientsLikeMe is the world's leading online health data sharing platform. PatientsLikeMe creates new knowledge by charting the real-world course of disease through the shared experiences of patients. While patients interact to help improve their outcomes, the data they provide helps researchers learn how these diseases act in the real world and accelerate the discovery of new, more effective treatments.