Ealth Management versus Health Leadership

Hello,

It needs to be pure literature review research on health management & health leadership.

CRITIQUES AND FINDINGS ABOUT WHAT OTHERS HAVE WROTE ON THE COMPARISONS, DIFFERENCES, SIMILARITIES OF HEALTH MANAGEMENT AND HEALTH LEADERSHIP.

for example:

what has been changed?
what has been found? findings
what works well? what doesnt?
which is more effective, health management or health leadership? why is it the more effective one?

please can it be from only web sources no older then 2005

thank you.