The phrase 'been reported that although' is correct and usable in written English.
You could use it when you want to introduce a statement that has been reported, but which is in contrast to another statement. For example: "It has been reported that although vaccinations are now widely available, many people are still choosing not to get them."
Recently it has been reported that although she was an Air Force nurse, she never left this country during the war; it didn't take that bit of information to undermine any seriousness about her profession.
Notably, it has been reported that although PNNs labeled by WFA are found primarily around PV interneurons, they are also found surrounding other types of cells including glutamatergic neurons40.
It has been reported that, although the formation of smaller crystallites was kinetically favored during the initial agglomeration, larger crystallites were thermodynamically favored[40].
It has been reported that, although the substance does not appear to have any direct effects on the myocardial contractility, it sometimes causes a decrease in heart rate and a dose-dependent decrease in arterial blood pressure and, in rare cases, leads to cardiac arrest or shock.
It has been reported that, although IL-10 knockout mice showed little difference in resistance to Mtb infection than wild-type mice[38], gene transgenic mice that overly expressed IL-10 exhibited increased reactivation of chronic infection[39].
It has been reported that although Tt-RNase HI has an intermediate folding state, Tk-RNase HII folds according to the two-state model [ 19, 36, 60].
It is reported that although the composite patch did to some extent reduce in the crack growth driving force, the original crack continued to grow unabated, eventually emerging from the edge of the repair.
It is reported that although DML3 is expressed in siliques and leaves, it is not expressed in mature seeds.
Accordingly, it is reported that although SP can evoke an inflammatory respose in the knee joint, this effect is unlikely to be a function on its own [ 34].
In Northwest Ethiopia, it was reported that although knowledge on HIV was reasonably high, considerable misconceptions were noted among the study population [ 20].
Yet, when the soybean cultivars Misuzudaizu and Bert were used, it was reported that although they exhibit significantly higher levels of soluble Met (2-fold), the level of total Met was not altered significantly [ 9].
