function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Castro-Huertas, Valentina & Grazia, Jocelia & Forero, Dimitri', 3],
    ['Castro-Huertas, Valentina & Schwertner, Cristiano F.', 1],
    ['Krein, Verônica & Bianchi, Filipe M. & Rider, David A.', 6],
    ['María C. Melo & Gimena Dellapé & Leonela Olivera', 1],
    ['Ruschel, Tatiana Petersen & Guidoti, Marcus & Barcellos, Aline', 1],
    ['Silva, Valeria Juliete Da & Santos, Cleverson Rannieri Meira Dos', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);