How to prescribe a vitamin D3 supplement dose when a patient comes back with his/her serum level checking (calculator)

If the patient is deficient in vitamin D.
First give a shot to the patient depending on the weight, age and level of deficiency. From 80k to 200k UI per os of vitamin D3. 

Second, calculate the delay before prescribing the daily dose with this paper (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4128480/) 

Third, prescribe the daily dose according to this calculator and check the serum level in 6 months or earlier if the initial level is very low (<10 nanograms/ml).