Bone marrow biopsy in low‐risk monoclonal gammopathy of undetermined significance reveals a novel smoldering multiple myeloma risk group. Issue 5 (6th March 2019) - Bustoros, Mark; Kastritis, Efstathios; Sklavenitis‐Pistofidis, Romanos; Liu, Chia‐Jen; Hornburg, Kalvis; Kanellias, Nikolaos; Kim, Geon; Liu, David; Gavriatopoulou, Maria; Marinac, Catherine R.; Roussou, Maria; Migkou, Magdalini; et al.