function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araújo, Marcel Santos De & Feres, Reinaldo José Fazzio', 1],
    ['Barreto, Mauricio & Burbano, María E. & Proctor, Heather C.', 1],
    ['Hernandes, Fabio A. & Valim, Michel P.', 2],
    ['Hernandes, Fábio A. & Valim, Michel P. & Mironov, Sergey V.', 3],
    ['Mironov, Sergey V. & Literak, Ivan & Sychra, Oldrich', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);