For example, Modern Healthcare ran an opinion piece introducing "systemness" to its readers in 2011. In a 2013 publication, the ECRI Institute has a cover story on "Systemness," here. Becker's Hospital Review ran a story in 2014, here.
A new Modern Healthcare special website is here, sponsored by Dignity Health, with an 11 page PDF white paper here.
Footnote: In the same vein. For an interesting new blog on using big data for better healthcare, rather than administrative pains, pointless metrics, and gaming, see Tom Burton of HealthCatalyst, here.