function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Davies, Natalie & Lafleur, Alexandre & Hochberg, Rick', 1],
    ['Meksuwan, Phuripong & Jaturapruek, Rapeepan & Maiphae, Supiyanit', 2],
    ['Meksuwan, Phuripong & Pholpunthin, Pornsilp & Segers, Hendrik', 3],
    ['Rougier, Claude & Pourriot, Roger', 1],
    ['Segers, Hendrik & Shiel, Russell J.', 5],
    ['Wallace, Robert L. & Dash, Katrina M. & Araújo, Thiago Q.', 1],
    ['Wallace, Robert Lee & Kordbacheh, Azar & Walsh, Elizabeth J.', 6],
    ['Wei, Nan & Jersabek, Christian D. & Yang, Yufeng', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);