P123 Optimal Regimen of Neoadjuvant Systemic Therapy for HER2 Positive Early Breast Cancer. (April 2023) - Lo, C.; Wang, M.-Y.; Kuo, W.-H.; Lee, Y.-H.; Tsai, L.-W.; Lu, Y.-S.; Lin, C.-H.; Chang, D.-Y.; Chen, W.-W.; Huang, C.-S.