<qa>  What is the name of the arm II?- Arm II: Patients are followed without treatment. Patients not receiving trastuzumab are followed at 4 months, 6 months, every 4 months for 1 year, and then every 6 months for 3 years. Patients receiving trastuzumab are followed at 4 months and then every 6 months for 3 years. 