function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Castro-Huertas, Valentina & Minghetti, Eugenia', 1],
    ['Dias-Silva, Karina & Moreira, Felipe Ferraz Figueiredo', 2],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 1],
    ['Mazzucconi, Silvia Ana & Reyes, Cristina Armúa De', 2],
    ['Moreira, Felipe Ferraz Figueiredo', 5],
    ['Moreira, Felipe Ferraz Figueiredo & Barbosa, Julianna Freires', 2],
    ['Riviaux, Senén Muñoz & Moreira, Felipe Ferraz Figueiredo', 1],
    ['Rodrigues, Higor D. D. & Arango, Luisa Fernanda Álvarez', 2],
    ['Rodrigues, Juliana Mourao dos Santos', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);