最后一句理解的对吗？

Although experiments using laboratory-induced nociception in animals can control for much genetic and experiential variability , this is not possible in humans suffering chronic or episodic pain. Every new episode or change in pain intensity , character, or localization activates cognitive processes and emotions that are influenced by the current context and meaning, which are affected by past pain experiences. These processes involve interacting neural networks which are subserved by a myriad of chemical messengers that communicate among sensory systems, including the pain system, and various cognitive-emotional processing and behavioral systems. Because of the uniqueness of each individual’s neural system and personal pain experience and the uniqueness of each context, in theory at least, no two pain experiences are ever the same. Therefore pain is always an intensely personal experience and clinically always a unique experience. The challenge for clinicians is to analyze for each patient, to the degree feasible in a particular clinical setting, the interaction of biopsychosocial factors and neural processes that activate and perpetuate pain, and to devise a treatment program that has the best chance of alleviating the pain (7–9).

虽然在动物中使用实验室诱导的伤害感受的实验可以控制许多遗传和经验上的变异性，但这在患有慢性或发作性疼痛的人类中是不可能的。疼痛强度、特征或定位的每次新发作或改变都会激活认知过程和情绪，这些过程和情绪会受到当时的情境和意义的影响，而当前环境和意义又会受到过去疼痛经历的影响。这些过程涉及相互作用的神经网络，这些神经网络由感觉系统（包括疼痛系统）、各种认知-情绪处理和行为系统之间交流的无数化学信使提供服务。由于每个个体的神经系统和个人疼痛体验的独特性，以及每个情境的独特性，至少在理论上，没有两种疼痛体验是完全相同的。因此，疼痛总是一种强烈的个人体验，在临床上始终是一种独特的体验。临床医生面临的挑战是：为每个患者进行分析、在特定的临床环境下，尽可能地找出激活和延续疼痛的生物心理社会因素和神经过程的相互作用、并设计出最有可能缓解疼痛的治疗方案（7-9）。

最后一句理解的对吗？The challenge (for clinicians) is to analyze | for each patient ，[to the degree (feasible) (in a particular clinical setting),the interaction (of biopsychosocial factors) and neural processes] that activate and perpetuate pain, || and [to devise a treatment program] that has the best chance (of alleviating the pain)(7-9).

三个to是并列的吗？