# Advanced Therapies - Acorn Stem Cell Collection and Secretome Production with Valerie Sheehan

> Preparation Instructions for Your Upcoming Acorn Stem Cell Banking and Secretome Production Appointment: Please ensure you arrive with freshly washed (dry) hair that is free of any styling products. Please avoid coloring your hair for two weeks prior to the procedure, as the quality of your hair follicles. The process of collecting your hair follicles takes approximately 30-45 minutes. If you need to cancel, kindly do so at least 24 hours in advance to avoid a cancellation fee. You can reach us by text at 929-556-6647 or email at concierge@extension.health.To help us stay on schedule, please arrive 10 minutes prior to your appointment time.

- Host: Valerie Sheehan
- Duration: 60 min
- Location: In Person (Organizer Address)
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://extension-health.cal.com/vsheehan/acorn-stem-cell-banking-secretome
- Event type id: 4052390

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4052390&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 4052390,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.