Correction to: Specific populations of urinary extracellular vesicles and proteins differentiate type 1 primary hyperoxaluria patients without and with nephrocalcinosis or kidney stones (Orphanet Journal of Rare Diseases, (2020), 15, 1, (319), 10.1186/s13023-020-01607-1)

The original publication of this article [1] contained an error in Fig. 3. In the last column of Kidney stones (KS) versus Nephrocalcinosis (NC) all arrows pointed upwards to indicate an increase. However, as shown in the data from the tables: all arrows in Kidney stones (KS) versus Nephrocalcinosis should point downwards to indicate a decrease. The exception is Urinary proteins, this remains an increase. The incorrect (Fig. 1) and correct (Fig. 2) versions of Fig. 3 are published in this correction article. The original article has been updated with the correct version. (Figure presented.).