"additional substantiation" is correct and is often used in written English.
You can use it when referring to additional proof or evidence to support a statement. For example: The witness provided additional substantiation to back up her testimony.
This ancient principle, "like cures like," was heralded by the Oracle at Delphi, the Bible, and various Eastern cultures, and the fact that modern-day immunology and allergy treatments derive from the primary principle of homeopathy, "the law of similars," provides additional substantiation to this system of medicine.
For additional substantiation that no exchange is taking place between the adsorbed H*Protein layer and the secondary proteins in the sequential adsorption experiments, the ToF-SIMS spectra were analyzed by PCA [ 20].
GlaxoSmithKline (GSK, Research Triangle Park, NC) acquired alitretinoin after a second phase III study (BAP01346 3) was conducted to provide additional independent substantiation of the phase III study results for the US Food and Drug Administration FDAA).
Ford's story is mostly substantiated indirectly, but it does have substantiation.
In addition, the cross-sectional study design does not allow the substantiation of causality, the latter necessitating prospective cohort studies.
In addition our experience reinforces the basis for adjuvant immunotherapy as a potential additional therapeutic modality for all patients with pancreatic cancer, a notion which has been based mainly on experimental findings but appears to collect clinical substantiation and certainly merits further investigation.
Data Integrity and Substantiation.
But he offered little substantiation.
Both depictions, however, lack credible substantiation.
Other bits of substantiation are even less plausible.
To make such assertions without substantiation is irresponsible.
