[exact_string]

...and seems that Nebula Genomics also outsources their sequencing:

> At its discretion, Nebula may use third-party laboratories to perform DNA extraction, sequencing, and data analysis.

(https://nebulagenomics.zendesk.com/hc/en-us/articles/3600243...)

I would guess the samples are eventually sequenced by BGI although Nebula FAQ (https://nebula.org/faqs/) says they sequence in EU.