function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arias-Penna, Diana Carolina & Whitfield, James B.', 4],
    ['Arias-Penna, Diana Carolina & Zhang, Yali & Whitfield, James B.', 4],
    ['Madl, M. & Achterberg, C. Van', 1],
    ['Rousse, Pascal & Gupta, Ankita', 1],
    ['Zeng, Jie & He, Jun-Hua & Chen, Xue-Xin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);