The 1-year survival vate was 30.0%(9/30) in MVP group and 39.3%(11/28) in VP group. The median survival duration was 9.6 months in MVP group and 11.5 months in VP group.

• 1年生存率、中位生存期在MVP和VP组分别为30·0%25(9/30)和39·3%25(11/28),9·6和11·5个月。