function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Mantelatto, Fernando L. & Tamburus, Ana Francisca', 4],
    ['Masunari, Setuko & Martins, Salise Brandt', 5],
    ['Parasram, Nadeshinie & Santana, William & Vallès, Henri', 1],
    ['Rogers, D. Christopher & Cruz-Rivera, Edwin', 1],
    ['Shih, Hsi-Te & Ng, Peter K. L. & Davie, Peter J. F.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    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);