function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['D., Guinot & de, Mazancourt V.', 2],
    ['Hsueh, Pan-Wen', 2],
    ['Naruse, Tohru & Mendoza, Jose Christopher E. & Ng, Peter K. L.', 2],
    ['Naruse, Tohru & Shokita, Shigemitsu & Kawahara, Takeshi', 1],
    ['Ng, Peter K. L. & Nesemann, Hasko F. & Sharma, Gopal', 1],
    ['Rahayu, Dwi Listyo & Ng, Peter K. L.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    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);