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. 2021 Jul 25;128(8):1233–1238. doi: 10.1007/s00702-021-02385-1

Fig. 1.

Fig. 1

Correlation between vitamin D (25(OH)D3) concentration and difference between GDS (Geriatric Depression Scale)—score at beginning and end of treatment (r = − 0.243, p = 0.008)