"persistently supported" is correct and usable in written English.
You can use it to refer to something that was done continuously and with determination over a period of time. For example, "He persistently supported his family until they could stand on their own."
"The arms embargo on Iran must be one of the first sanctions to be lifted … Especially since Iran is persistently supporting the fight against Isis [Islamic State] and the elimination of this threat in the region," the Russian foreign minister, Sergei Lavrov, said, according to tweets from his ministry.
The lithological characteristics of that peat-based island supported a persistently depressed groundwater table, while tree islands with elevated ratios of peat-to-sand content did not.
Some persistently reported support for Yes at 45 per cent or above, while others rarely put it at more than 40 per cent.
Our simulation supported by experiment suggests that the polymer residues persistently present on the graphene transferred by the conventional polymer-assisted method are equivalent to an ultrathin film of less than 1 nm thickness.
Some countries, including Denmark and Germany, supported the idea of financial penalties for countries that persistently refused to take back illegal immigrants or that did little to stop trafficking in people.
LOESS curves supported this finding, as women with and without HLA-A*03 01 HLA-A*03 01y differed in VL over the study intervals (1,732 persistentlys, P < 0.0001) (Fig. 1).
That the fever was of short duration despite persistently positive blood cultures supports this conclusion.
Our study supported the pursuit of normal ScvO2 as the first goal in the case of persistently poor peripheral perfusion (PI ≤0.6) after resuscitation.
(Senior Manager, Clinical Services) However, some participants supported the introduction of penalties, saying that it was overdue in the light of persistently low compliance rates and the risk of HCAIs: I agree that penalties should be introduced.
