Week #1: Read the paper mentioned below and answer the questions proposed.

Paper: DataQuality and Integration Issues in Electronic Health Records

by: Ricardo João Cruz-Correia, Pedro Pereira Rodrigues, Alberto Freitas, Filipa Canario Almeida, Rong Chen, and Altamiro Costa-Pereira

1. What are the main kinds of data errors discussed in this paper? 
2. Would it be possible to automatically identify and categorize those errors?
3. What are missing values?
   
4. How missing values are categorized?
   
5. What are the main methods used to handle missing values?