All patients had moderate-to-active disease, as observed by baseline mean ESR and CRP levels (particularly for patients with RA with mean CRP of 10.2 ± 18.1 mg/L and ESR of 23.6 ± 22.1 mm/h), DAS28-CRP for patients with RA and PsA (4.1 ± 0.94 and 3.8 ± 0.99, respectively), ASDAS-CRP (2.9 ± 0.97) and BASDAI (6 ± 2.1) for axSpA patients. Here, CRP is linked to glycogen storage disease VI.