function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Azevedo, Fernanda & Hajdu, Eduardo & Willenz, Philippe', 1],
    ['Borojevic, Radovan & Boury-Esnault, Nicole & Vacelet, Jean', 1],
    ['Chu, Yan-Ling & Gong, Lin & Li, Xin-Zheng', 1],
    ['Van Soest, Rob W. M.', 2],
    ['Van, Rob W. M.', 1],
    ['Van, Rob W. M. & De, Nicole J.', 3],
    ['Van, Rob W. M. & Kaiser, Kirstie L. & Syoc, Robert Van', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    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);