function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Campos, Luiz Alexandre & Grazia, Jocelia', 1],
    ['Castro-Huertas, Valentina & Grazia, Jocelia & Forero, Dimitri', 17],
    ['Castro-Huertas, Valentina & Schwertner, Cristiano F.', 2],
    ['Garbelotto, Thereza de Almeida & Bianchi, Filipe Michels', 1],
    ['María C. Melo & Gimena Dellapé & Leonela Olivera', 3],
    ['Matesco, Viviana Cauduro & Bianchi, Filipe Michels', 1],
    ['Rider, David A. & Swanson, Daniel R.', 13],
    ['Silva, Valeria Juliete Da & Santos, Cleverson Rannieri Meira Dos', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    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);