They和on the front end怎么理解？

Meeting the Mandate for Value-Based Care Delivery Models that Are Evidence-Guided and Outcomes-Driven

An illustration of coordinated care that potentially meets the requirements for Advanced APMs and Medicare Bundled Payments for Care Improvements (BPCI) is the growth in musculoskeletal (MSK) service lines in most ACOs. These MSK service lines are complex, coordinated, multidisciplinary/interprofessional, outpatient/inpatient, value-based care delivery models that span the continuum of care. They include physical medicine and rehabilitation (PM&R) specialists on the front end to address acute/acute on chronic low back pain (duration <12 weeks), working with physical therapy and medication management. For patients who experience pain beyond 12 weeks, the above triage is supplemented by referral to an interventional pain medicine specialist. Some patients will also require care from a behavioral medicine specialist for treatments to enhance coping strategies and resilience. If necessary, then according to the triage protocol, the next step will include specialized imaging and referral to a spine surgeon for evaluation and possible surgery.

满足以证据导向和预后驱动的基于价值的医疗模式的要求

大多数ACOs中，肌肉骨骼医疗服务的增长表明，协作医疗可能满足高级APM和医疗改善捆绑支付（Medicare Bundled Payments for Care Improvements，BPCI）的要求。这些肌肉骨骼医疗服务项目是复杂、协同性的、跨学科/跨专业性的、门诊/住院的、基于价值的、涵盖了整个医疗过程的连续医疗的服务模式，包括为了解决急性腰痛或慢性腰痛急性发作（持续时间＜12周）前期的物理治疗和康复医学专家而使用的物理治疗和用药管理的服务。对于疼痛超过12周的患者，会转诊至介入疼痛医学专家进行进一步治疗。为增强应对策略和适应能力，某些患者还需要接受行为医学专家的治疗。如有必要，根据分诊协议，接下来的流程主要为专科影像学检查、转诊给脊柱外科医师进行评估和手术。

They指These MSK service lines？

on the front end前期的？

谢谢