diff --git a/code/step_1_data_collection_Luis.py b/code/step_1_data_collection_Luis.py
index 5945465..eb607da 100644
--- a/code/step_1_data_collection_Luis.py
+++ b/code/step_1_data_collection_Luis.py
@@ -1,3 +1,27 @@
+"""
+Code created by: lrmercadod
+Date: 5/6/2024 10:43:45
+PubMed Record Fetcher and Saver
+
+This script is designed to automate the retrieval of PubMed records based on a specific topic and year. It uses the NCBI E-utilities API to fetch data in MEDLINE format and saves each year's data in a separate text file within a structured directory.
+
+Features:
+- Fetches PubMed records using a combination of the topic and year to form a query.
+- Retrieves data in MEDLINE format, which includes structured bibliographic information.
+- Saves the fetched data into text files, organizing them by topic and year under the './results/baseline_doc' directory.
+- Handles network and API request errors by implementing retry logic with exponential backoff.
+
+Usage:
+- The user must provide an NCBI API key and email for using NCBI's E-utilities.
+- Modify the 'topic' variable and the year range in the script to fetch records for different topics or years.
+
+Dependencies:
+- BioPython for interacting with NCBI's E-utilities.
+- requests for making HTTP requests.
+
+Example:
+To use the script, simply run it in a Python environment with the necessary dependencies installed. Ensure that the API key and email are correctly set up in the script.
+"""
 import requests
 from Bio import Entrez
 from io import StringIO