hAMSC treatment regimen: (1) Intravenous infusion: 1.0×10⁶ cells/kg administered three times consecutively at weeks 1, 2, and 4, followed by once every 4 weeks for a total of 8 doses (6 months). (2) Local injection: 2.0×10⁴ cells/cm² of wound area, administered concurrently. Treatment may be terminated earlier or extended based on clinical condition.

(1) Intravenous infusion: 1.0×10⁶ cells/kg administered three times consecutively at weeks 1, 2, and 4, followed by once every 4 weeks for a total of 8 doses (6 months). (2) Local injection: 2.0×10⁴ cells/cm² of wound area, administered concurrently. Treatment may be terminated earlier or extended based on clinical condition.

The Bates-Jensen Wound Assessment (BWAT) is a standardized tool for quantitative assessment of wound healing that includes the 13 items listed below: (1)Size; (2)Depth; (3)Edges; (4)Undermining or pockets; (5)Necrotic tissue type; (6)Necrotic tissue amount; (7)Exudate type; (8)Exudate amount; (9)Surrounding skin color; (10)Peripheral tissue edema; (11)Peripheral tissue induration; (12)Granulation tissue; (13)Epithelialization.

Each item was rated on a scale of 1 (best) to 5 (worst). The BWAT total score is the sum of the individual items with a possible range of 13 (best) to 65 (worst).

Assessed by pain visual analog scale (VAS). VAS Score is a horizontal line, 100 mm in length, anchored by word descriptors at each end. The subject marked the point on the line that represented his/her perception of his/her current pain status. VAS Score was determined by measuring in millimeters from the left hand end of the line (no pain) to the point that the subject marked. VAS Score range 0 (best) to 100 (Worst).