Complex sentence: Ligament cells differ in size, respond to different cues in the cell environment, and express different cell surface markers, limiting the number of clinical treatments for accelerated repair of ACL tissue to MSCs and primary fibroblasts obtained from other ACL tissue.
Split into simpler sentences: Ligament cells differ in size, respond to different cues in the cell environment, and express different cell surface markers. This limits the number of clinical treatments for accelerated repair of ACL tissue to MSCs and primary fibroblasts obtained from other ACL tissue.