function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Costa, Wilson J. E. M.', 6],
    ['Costa, Wilson J. E. M. & Amorim, Pedro F.', 1],
    ['De Oliveira, Rianne C. & Ota, Renata R. & Deprá, Gabriel C.', 1],
    ['Deprá, Gabriel De Carvalho & Silva, Hugmar Pains', 2],
    ['Ota, Renata Rúbia & Deprá, Gabriel de Carvalho', 1],
    ['Volcan, Matheus V. & Severo-Neto, Francisco', 3],
    ['Volcan, Matheus Vieira & Klotzel, Bruno', 2],
    ['Ywamoto, Eric Venturini & Nielsen, Dalton Tavares Bressane', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);