HMGB1 and neoplasm: The use of allogeneic heat shock‐conditioned tumor cell lysates provides a vast number of different tumor‐specific antigens and also delivers different DAMPs such as HMGB1 and CRT, which are necessary for the proper maturation, activation, and cross‐presentation of tumor‐associated antigens to DCs, in turn enhancing their antitumor‐induced response.