Improving Advanced Care Planning through Physician Orders for Life-Sustaining Treatment (POLST) Expansion across the United States: Lessons Learned from State-Based Developments.

POLST programs continue to grow, but not without barriers. Based on the experiences of developing coalitions, we were able to identify strategies to expand POLST programs and overcome barriers. Ultimately the "lessons learned" in this study can serve as a guide to improve the reach of POLST or similar programs.