RGMIA digitization. CAVAL 2011
1. In the title the square root symbol goes above all the characters after it
2. The letters and plus sign in front of the square root sign in title are superscript
3. 1 mathematical equation in abstract indicated with ***. Do not release to VUIR until formula can be expressed correctly Lyn 30/8/12
Permission granted, in perpetuity, RGMIA version. liz 7/9/12
Title and abstract updated, and released to live archive. Lyn 7/8/2020