Surprisingly, this has never been evidenced [32]!
DRS evidenced Fe2O3 on samples with Fe-content≥2.8 atoms nm−2.
characterizing migraine subjects, so far not evidenced [7, 8].
Nine studies were published as level IV evidence [7, 8, 11, 13, 23, 28], three as level III evidence [17, 19, 27], and one each as level II [15] and level I evidence [29].
Our finding of an improved survival by high SES for ovarian cancer does neither seem to be consistently evidenced [ 1, 7, 8].
The detrimental impact of progressive and life-limiting diseases such as HIV and advanced cancer on spiritual aspects of well-being is well evidenced [ 1]– [ 3], including in sub-Saharan Africa [ 4, 5].
Evidence #1: Elephant not Dogville in 2003.
Our "best-evidence synthesis" consisted of five levels of evidence ranging from strong evidence (1), moderate evidence (2), limited evidence (3), conflicting evidence (4), to no evidence (5), which reflected the type of study design used (Table 2).
Selected studies were categorized into 5 levels of evidence: (1) strong evidence; (2) moderate evidence; (3) limited evidence; (4) indicative findings; and (5) no or insufficient evidence (Table 1) [ 72].
§ Not-accepted surrogates = all the recommendations with surrogate acceptability classified as: no (e2) = implicit no "evidence 2"; no (ref) = implicit no "reference"; no (e) = explicit no "evidence 1"; no (e1 + e2) = explicit no "evidence 1" and implicit no "evidence 2".
