Disclosure statement
No potential conflict of interest was reported by the author(s).
Authors contribution
SN and CU: Conception, design, writing and editing of manuscript. SB: Writing and editing of manuscript and literature search. KL, LK, DK, MJH, JS, VG: Writing and editing of manuscript. IM: Writing and editing of manuscript, especially pathologic aspect. WTH: Writing and editing of manuscript, especially cytogenetic aspect.