PK Study in Adult Healthy Volunteers to Assess QD Dosing With the Selected Age-appropriate MR Formulations

"For the the relative bioavailability (BA) assessment , the investigational product(s) are:~Test: 10 mg dose of age-appropriate MR formulations (MR-fast, MR-moderate, MR-slow). Each formulation contains 0.025 mg of tofacitinib/mg of microsphere. Reference: 10 mg dose of tofacitinib IR solution (1 mg of tofacitinib/mL).~For the the food effect assessment, the investigational product(s) are:~Test: 10 mg dose of age-appropriate MR formulations (MR-fast or MR-slow) c-oadministered with high-fat FDA breakfast. Reference: 10 mg dose of age-appropriate MR formulations (MR-fast or MR-slow) administered under fasted state."