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[The living tree of nursing theories].

TOPIC Three behavioral theories have been used to develop major nursing theories: interactive, systems, and developmental. 
 
PURPOSE To provide a symbolic image as a framework for nurses to visualize the multitude of nursing theories starting with the first nurse theorist, Florence Nightingale. 
 
SOURCES Published research articles, authors' experience, educational classes and workshops. 
 
CONCLUSIONS The Living Tree helps organize various nursing theories so a nurse can apply the theories to practice.