"I initially used" is correct and usable in written English.
It can be used in various situations, such as when discussing a sequence of events or actions, describing the beginning stages of a process, or explaining a change or transition. Example: "I initially used a different method to solve the problem, but after further research, I found a more effective solution."
I initially used a crowbar that punched holes in the ceiling.
I initially used relatively permissive criteria to define blocks: a minimum length of eight residues, with an average entropy of 0.4, at most two gaps of length one, and at most two sites with an entropy > 0.2.
For all GLLAMM models, I initially used adaptive quadrature with 8 quadrature points.
For example, in the course of such experiments I initially used a polyethylene transfer pipette (Fisher Scientific) to move slices from the holding chamber to the experimental apparatus.
The Medical Research Council had become responsible for the "war-surplus" radium after World War I, and initially used it for a radium bomb (teleradiotherapy) at the Middlesex Hospital in London.
During World War I, they were initially used to escort Allied troop convoys in the Mediterranean.
Although I was never a rabid user of Twitter, I did initially use it on a regular basis but now will frequently go days between tweets or without even looking at it.
Therefore, though I will initially use a widely accepted definition of culture, later on I will specify the cultural factor that interests us in a very precise form, so that the factor can be included in utility and production functions.
The first-order conditional estimation with interaction (FOCE-I) with ADVAN5 was initially used to fit the model against the mean (total) teriflunomide concentrations (272 observations) extracted from the literature (described in Supplementary Results).
In the phase I exploratory cohort, we initially used immunomagnetic bead separation of CTCs to assess levels of mGSTP1 in blood from men with CRPC.
To amplify the mitochondrial Cytochrome c Oxidase I gene (COI), we initially used the primers GaZF1 and GaZR1 and PCR conditions described by [ 50].
