The following message of the authors has been received July
Dear Professor Hengstler,
we request to withdraw this review because of the first author's mistake in English writing and reference citation improperly. We apologize for inconvenience to the Journal editors and readers.
Director & Professor
State Key Laboratory of Cancer Biology & Institute of Digestive Diseases
Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, P.R.China