Neoadjuvant Chemotherapy with Concurrent Letrozole for Estrogen Receptor-Positive and HER2-Negative Breast Cancer: An Open-Label, Single-Center, Nonrandomized Phase II Study (NeoCHAI). - Chae, Heejung; Sim, Sung Hoon; Kwon, Youngmi; Lee, Eun-Gyeong; Han, Jai Hong; Jung, So-Youn; Lee, Seeyoun; Kang, Han-Sung; Kim, Yeon-Joo; Kim, Tae Hyun; Lee, Keun Seok (Cancers, 2024)