What is the milligram (mg) dosage of prednisolone per 5 milliliters (ml)?

From the FDA Drug Label

For the purpose of comparison, 5 mL of prednisolone sodium phosphate oral solution (20. 2 mg prednisolone sodium phosphate) is equivalent to the following milligram dosage of the various glucocorticoids: ... Prednisolone, 15

• The milligram (mg) dosage of prednisolone per 5 milliliters (ml) is 15 mg of prednisolone base 1

From the Research

Dosage of Prednisolone

• The dosage of prednisolone per 5 milliliters (ml) is 5 mg, as stated in the study 2.
• This study prepared a highly concentrated liquid prednisolone formula for oral administration, with 1 or 5 mg prednisolone per ml.
• The other studies do not provide information on the specific dosage of prednisolone per 5 ml, but rather discuss the pharmacokinetics and efficacy of prednisolone in various doses and conditions 3, 4, 5, 6.