function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Felix, Rob P. W. H. & Massa, Bruno', 1],
    ['Hollier, John', 2],
    ['Hugel, Sylvain', 1],
    ['Massa, Bruno', 3],
    ['Nagar, Rajendra & Swaminathan, Rajamani & Meena, Ashok Kumar', 4],
    ['Naskrecki, Piotr & Guta, Ricardo', 2],
    ['Sri-In, Chalida & Yang, Jeng-Tze', 2],
    ['Tan, Ming Kai & Kamaruddin, Khairul Nizam', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);