function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carpenter, James M. & Brown, Graham R.', 2],
    ['Dorji, Phurpa & Nidup, Tshering & Klein, Wim & Dorji, Cheten', 1],
    ['Gawas, Sandesh M. & Kumar, Girish & Pannure, Arati', 2],
    ['Lee, John X. Q. & Soh, Zestin W. W. & Chui, Shao Xiong', 1],
    ['Mahmood, Khalid & Ullah, Mishkat & Aziz, Abdul', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=7)',
    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);