function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aspe, Nonillon M. & James, Samuel W.', 1],
    ['Gershwin, Lisa-Ann & Collins, Allen G.', 2],
    ['Gershwin, Lisa-Ann & Zeidler, Wolfgang', 3],
    ['Morandini, André C. & Da, Fábio L. & Silveira', 2],
    ['Morandini, André C. & Marques, Antonio C.', 18],
    ['Mutlu, Erhan & Çağatay, I. Tulay & Olguner, M. Tunca', 1],
    ['OLIVEIRA, OTTO M. P. & MIRANDA, THAÍS P. & ARAUJO, ENILMA M.', 2],
    ['Ras, V. & Neethling, S. & Engelbrecht, A. & Morandini, A. C.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);