function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Eeckhaut, Igor', 1],
    ['Greg W. Rousea & Deborah Lanterbecq & Mindi M. Summersa', 7],
    ['Kolbasova, Glafira D. & Mekhova, Elena S.', 1],
    ['Mikac, Barbara', 1],
    ['Rouse, Greg W. & Grygier, Mark J.', 1],
    ['Summers, Mindi M. & Al-Hakim, Iin Inayat & Rouse, Greg W.', 21],
    ['Terrana, Lucas & Eeckhaut, Igor', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    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);