Is "Concerns regarding the statistical analysis and data integrity" more formal than "Concerns about the statistical analysis and data integrity"?

It seems to me that "about" is too casual to be used in this serious stituation. I am not sure.

Open letter to MR Mehra, SS Desai, F Ruschitzka, and AN Patel, authors of“Hydroxychloroquine or chloroquine with or without a macrolide for treatment of COVID-19: a multinational registry analysis”. Lancet. 2020 May 22:S0140-6736(20)31180-6. doi: 10.1016/S0140-6736(20)31180-6. PMID: 32450107 and to Richard Horton (editor of The Lancet).

Concerns regarding the statistical analysis and data integrity

The retrospective, observational study of 96,032 hospitalized COVID-19 patients from six continents reported substantially increased mortality (~30% excessdeaths) and occurrence of cardiac arrhythmias associated with the use of the 4-aminoquinoline drugs hydroxychloroquine and chloroquine. These results have had a considerable impact on public health practice and research

Source: An open letter to Mehra et al and The Lancet (May 28, 2020)