function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chullasorn, Supawadee & Dahms, Hans-U. & Klangsin, Pradchek', 1],
    ['Chullasorn, Supawadee & Kangtia, Pawana & Song, Sung Joon', 3],
    ['Lee, Seunghan & Kim, Kichoon & Lee, Wonchoel', 1],
    ['McAllen, Rob', 1],
    ['Nazari, Fatemeh & Mirshamsi, Omid & Arbizu, Pedro Martinez', 2],
    ['Pugh, P. J. A. & Dartnall, H. J. G. & McInnes, S. J.', 3],
    ['Wells, J. B. J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);