function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anjos-Santos, Danielle & Pessacq, Pablo & Costa, Janira Martins', 1],
    ['DeMarmels, Jurg', 5],
    ['Dijkstra, Klaas-Douwe B. & Kalkman, Vincent J. & Dow, Rory A.', 2],
    ['Gonzalez Soriano, Enrique & Noguera, Felipe', 1],
    ['Mauffray, William F. & Tennessen, Kenneth J.', 1],
    ['Souza, Luiz Onofre Irineu De & Pepinelli, Mateus', 2],
    ['Takiya, Daniela Maeda & Santos, Allan Paulo Moreira', 4],
    ['Wasscher, Marcel T. & Van, Johan G.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    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);