The part of a sentence "has previously been documented" is correct and usable in written English.
You can use this phrase when you are referring to something that has been officially recorded or observed in the past. For example: "The negative effects of this medication on patients with certain existing medical conditions has previously been documented."
Systematisation and team-based training in trauma care has previously been documented to have beneficial in-hospital effects [18].
The age profile of the offenders in our study differed in some respects from what has previously been documented in studies on child sexual abuse.
This effect has previously been documented as driving adoption of technologies such as home computers [35], electronic payments [36], and mobile phones [37].
Although it has previously been documented that symbiotic fungi can promote the growth of their host plants (Stewart and Kane 2007; Zhang et al. 2012), the mechanism by which this occurs remains unclear.
Dr. Bob's success has previously been documented in a Wall Street Journal article and on ESPN's E60 sports magazine show, and now he brings his sports betting insights to the Huffington Post.
This miRNA has previously been documented to be involved in regulation of p53 expression levels [31].
This apparent polymorphism of bloodstream strains has previously been documented in patients for opa and pilin expression [61].
Such a decrease in cyclin A expression by cyclopamine has previously been documented in ovarian carcinoma [38].
It has previously been documented that cells pre-treated with a low H2O2 dose develop a resistance to higher doses of H2O2 and consequently to stress [34] [36].
The expression of the three PPAR subtypes has previously been documented in kidney [41], [42] and proximal tubule cell lines, including LLC-PK1 cells [53], [54], [55].
Evidence of endothelial activation following tourniquet-induced ischaemia- reperfusion injury has previously been documented using a non-surgical human model [2], [21].
