function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Camile Sorbo Fernandes & Ivanklin Soares Campos-Filho', 1],
    ['Campos-Filho, Ivanklin Soares & Fernandes, Camile Sorbo', 2],
    ['Grangeiro, Daniela C. & Souza, Leila A.', 2],
    ['Grangeiro, Daniela Correia & Souza, Leila Aparecida', 4],
    ['Ocampo-Maceda, Ana Teresa & Ruelas-Cabana, Carlos Miguel', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);