Cathinones derivatives‐related deaths as exemplified by two fatal cases involving methcathinone with 4‐methylmethcathinone and 4‐methylethcathinone. Issue 7 (18th February 2014) - Rojek, Sebastian; Kłys, Małgorzata; Maciów‐Głąb, Martyna; Kula, Karol; Strona, Marcin; Brandt, Simon D.