https://www.selleckchem.com/products/mrtx1133.html 03). A binary logistic regression model showed that longer weekly working hours (adjusted odds ratio=1.29, 95% confidence interval 1.09-1.52, P=0.004) was a risk factor for burnout, while higher monthly income (adjusted odds ratio=0.78, 95% confidence interval 0.64 to 0.95, P=0.02) was protective against burnout, suggesting that younger pediatric orthopedists were more susceptible. No significant difference between full-time and part-time pediatric orthopedists or between sexes was detected in the adjusted analysis. Chinese pediatric orthopedists have a relatively high rate of burnout. Younger pediatric orthopedists have a greater chance of experiencing burnout. These results highlight the need for further policies, especially focused on younger pediatric orthopedists, to assist in better developing Chinese pediatric orthopedics. Level IV. Level IV. Intramuscular venous malformations, often erroneously called "intramuscular hemangiomas," present to pediatric orthopaedic surgeons either as a differential diagnosis of tumor or as a cause of muscle pain. Treatment options include injection sclerotherapy or surgery. There is some literature to indicate that sclerotherapy can reduce pain, but little evidence on the effectiveness of surgery. The primary aim of this study was to evaluate the efficacy of surgical resection for intramuscular venous malformations, with a secondary aim to evaluate the natural history and presentation of intramuscular venous malformations to improve clinician understanding of this condition. A retrospective chart analysis was performed of cases identified from a vascular anomalies database from January 2004 and December 2018. Primary outcome was change in preoperative and postoperative pain. Natural history of the lesion was assessed, including age when the lesion was first noticed, when it became painful, and when it required ta margin leaving a functional limb. Sometimes resection of a whole