diff --git a/src/01-introduction.md b/src/01-introduction.md
index 06b0a361d6..83e1942af2 100644
--- a/src/01-introduction.md
+++ b/src/01-introduction.md
@@ -68,8 +68,9 @@ evolve over time. A number of extensions are currently being worked on:
 | [BEP019](https://docs.google.com/document/d/1FqJI791ycXr0bfRg2qyLqAf0RpVttJ2cInOgMWrKsNU) | [DICOM Metadata](https://docs.google.com/document/d/1FqJI791ycXr0bfRg2qyLqAf0RpVttJ2cInOgMWrKsNU)                                                                                             | Satrajit Ghosh                                                 |
 | [BEP020](https://docs.google.com/document/d/1eggzTCzSHG3AEKhtnEDbcdk-2avXN6I94X8aUPEBVsw) | [Eye Tracking including Gaze Position and Pupil Size(ET)](https://docs.google.com/document/d/1eggzTCzSHG3AEKhtnEDbcdk-2avXN6I94X8aUPEBVsw)                                                    | Benjamin Gagl and Dejan Draschkow                              |
 | [BEP021](https://docs.google.com/document/d/1PmcVs7vg7Th-cGC-UrX8rAhKUHIzOI-uIOh69_mvdlw) | [Common Electrophysiological Derivatives](https://docs.google.com/document/d/1PmcVs7vg7Th-cGC-UrX8rAhKUHIzOI-uIOh69_mvdlw)                                                                    | Stefan Appelhoff, Cyril Pernet, Robert Oostenveld, Teon Brooks |
-| [BEP022](https://docs.google.com/document/d/1yzsd1J9GT-aA0DWhdlgNr5LCu6_gvbjLyfvYq2FuxlY) | [PET Preprocessing derivatives](https://docs.google.com/document/d/1yzsd1J9GT-aA0DWhdlgNr5LCu6_gvbjLyfvYq2FuxlY)                                                                              | Martin Noergaard, Graham Searle, Melanie Ganz                  |
-| [BEP023](https://docs.google.com/document/d/1fqnJZ18x5LJC8jiJ8yvPHUGFzNBZ6gW2kywYrUKWtuo) | [Computed Tomography scan (CT)](https://docs.google.com/document/d/1fqnJZ18x5LJC8jiJ8yvPHUGFzNBZ6gW2kywYrUKWtuo)                                                                              | Hugo Boniface                                                  |
+| [BEP022](https://docs.google.com/document/d/1pWCb02YNv5W-UZZja24fZrdXLm4X7knXMiZI7E2z7mY) | [Magnetic Resonance Spectroscopy (MRS)](https://docs.google.com/document/d/1pWCb02YNv5W-UZZja24fZrdXLm4X7knXMiZI7E2z7mY)                                                                      | Dickson Wong                                                   |
+| [BEP023](https://docs.google.com/document/d/1yzsd1J9GT-aA0DWhdlgNr5LCu6_gvbjLyfvYq2FuxlY) | [PET Preprocessing derivatives](https://docs.google.com/document/d/1yzsd1J9GT-aA0DWhdlgNr5LCu6_gvbjLyfvYq2FuxlY)                                                                              | Martin Noergaard, Graham Searle, Melanie Ganz                  |
+| [BEP024](https://docs.google.com/document/d/1fqnJZ18x5LJC8jiJ8yvPHUGFzNBZ6gW2kywYrUKWtuo) | [Computed Tomography scan (CT)](https://docs.google.com/document/d/1fqnJZ18x5LJC8jiJ8yvPHUGFzNBZ6gW2kywYrUKWtuo)                                                                              | Hugo Boniface                                                  |
 
 When an extension reaches maturity it is merged into the main body of the
 specification. If you would like to contribute to BIDS please consult the