Subject to numerous cultural contingencies, the techniques likely first appeared in history many thousands of years ago in the tranceinducing practices of shamans but became ever more systematized, refined, and clarified over time
काळजीपूर्वक घेतलेल्या रुग्णाच्या माहितीमध्ये आधी घेतलेली औषधे, आहारातील बदल, कौटुंबिक इतिहास, आणि इतर लक्षणांचा समावेश होतो.