function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bravo, Freddy', 3],
    ['Cordeiro, Danilo & Bravo, Freddy & Chagas, Cínthia', 2],
    ['Cordeiro, Danilo Pacheco', 1],
    ['Cordeiro, Danilo Pacheco & Aquino, Karina Kethelen Silva De', 1],
    ['Durán-Luz, Juana & Ibáñez-Bernal, Sergio', 2],
    ['Ferreira, André Da Silva & Araújo, Maíra Xavier', 1],
    ['Ibáñez-Bernal, Sergio & Durán-Luz, Juana', 3],
    ['Ježek, Jan & Pont, François Le & Martinez, Eddy', 2],
    ['Omad, Guillermo & Rossi, Gustavo C.', 1],
    ['Rogers, D. Christopher & Cruz-Rivera, Edwin', 1],
    ['Sinclair, Bradley J.', 1],
    ['Tkoč, Michal & Ježek, Jan & Pont, François Le', 1],
    ['Tkoč, Michal & Pecharová, Martina & Ježek, Jan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);