Table 1.

Level of the agreement, level of evidence, and recommendation used in this consensus

Level of agreement
I	Accepted completely
II	Accepted with some reservation
III	Accepted with major reservation
IV	Rejected with reservation
V	Rejected completely
Level of evidence
I	Evidence obtained from at least one randomized controlled trial
II-1	Evidence obtained from well-designed controlled trials without randomization
II-2	Evidence obtained from well-designed cohort or case-controlled study
II-3	Evidence obtained from the comparison between time and places with or without intervention
III	The opinion of respected authorities, based on experience or expert committees
Recommendation (based on the quality of evidence)
A	There is good evidence to support the statement
B	There is fair evidence to support the statement
C	There is poor evidence to support the statement but recommendation made on other grounds
D	There is fair evidence to refute the statement
E	There is good evidence to refute the statement