function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bamber, Roger N & Chatterjee, Tapas & Marshall, David J', 1],
    ['Bamber, Roger N.', 2],
    ['DRUMM, DAVID T. & HEARD, RICHARD W.', 4],
    ['Kong, Chim Chee', 1],
    ['Tzeng, You-Wei & Ma, Lin & Li, Xinzheng', 2],
    ['Wi, Jin Hee & Kang, Chang-Keun & Soh, Ho Young', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);