function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Castro, Clovis B. & Thiago, Cristovam M. & Medeiros, Marcelo S.', 1],
    ['Horvath, Elizabeth Anne', 5],
    ['Nonaka, Masanori & Hanahara, Nozomi & Kakui, Keiichi', 1],
    ['Nonaka, Masanori & Hayashibara, Takeshi', 8],
    ['Nonaka, Masanori & Muzik, Katherine & Iwasaki, Nozomu', 6],
    ['Tu, Tzu-Hsuan & Altuna, Álvaro & Jeng, Ming-Shiou', 6],
    ['Tu, Tzu-Hsuan & Dai, Chang-Feng & Jeng, Ming-Shiou', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);