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Trade and other receivables (Details 4) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Balance at the beginning of year $ (4,154,752) $ (3,837,914)
First application effect IFRS 9 (192,377) 0
Initial balance restated (4,347,129) (3,837,914)
Impairment estimate for accounts receivable (1,697,861) (1,948,264)
Uncollectible accounts 527,545 634,256
Add back of unused provisions 448,056 832,704
Estimates resulting from business combinations [1] (1,354,559) 0
Effect of translation into presentation currency 364,747 164,466
Total $ (6,059,201) $ (4,154,752)
[1] See Note 15 – Business Combinations.