Generation of a safe and efficacious llama single-domain antibody fragment (vHH) targeting the membrane-proximal region of 4-1BB for engineering therapeutic bispecific antibodies for cancer ============================================================================================================================================================================================= * Tianhang Zhai * Chao Wang * Yifeng Xu * Weifeng Huang * Zhijun Yuan * Tao Wang * Shuang Dai * Shaogang Peng * Tuling Pang * Wenchao Jiang * Yuhua Huang * Yuefeng Zou * Yingda Xu * Joanne Sun * Xinjiang Gong * Jinping Zhang * Andy Tsun * Bin Li * Xiaoniu Miao