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[2]https://www.healthaffairs.org/do/10.1377/forefront.20190507.746358/full/
[3]https://www.healthaffairs.org/do/10.1377/forefront.20190507.746358/full/
[4]https://www.healthaffairs.org/do/10.1377/forefront.20190507.746358/full/
[5]https://www.healthaffairs.org/do/10.1377/forefront.20190507.746358/full/
[6]https://www.healthaffairs.org/do/10.1377/forefront.20190507.746358/full/
[7]https://www.healthaffairs.org/do/10.1377/forefront.20190507.746358/full/