Who are the nephrologists mentioned in the context?

The nephrologists mentioned in the context are Chang and James. This pair is significant due to their expertise in kidney-related health issues, reflecting a specialization in nephrology, which is the branch of medicine concerned with the study and treatment of kidney function and kidney diseases. Their inclusion in discussions or literature related to nephrology indicates their contributions or roles in research, clinical practice, or education in this medical field. This recognition highlights their authority and the importance of their work in advancing knowledge and treatment options for patients with kidney conditions. Thus, identifying Chang and James emphasizes their relevance in nephrology discussions and underscores the need to acknowledge reputable figures in medical specialties.