function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Asahina, Syoziro', 1],
    ['Dijkstra, Klaas-Douwe B. & Kalkman, Vincent J. & Dow, Rory A.', 5],
    ['Dow, Rory A.', 1],
    ['Dow, Rory A. & Phan, Quoc Toan & Choong, Chee Yen', 2],
    ['Gurung, Mer Man & Phan, Quoc Toan', 1],
    ['Joshi, Shantanu & Subramanian, K. A. & Babu, R.', 5],
    ['Kirby, W. F.', 1],
    ['Kirby, William Forsell', 1],
    ['Kompier, Tom', 7],
    ['Phan, Quoc Toan & Kompier, Tom', 11],
    ['Yu, Xin & Bu, Wenjun', 1],
    ['van Tol, Jan', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);