function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bertolino, Marco & Costa, Gabriele & Bavestrello, Giorgio', 1],
    ['Bettcher, Larissa & Fernandez, Julio C. C. & Gastaldi, Marianela', 1],
    ['Diaz, Maria Cristina & Nuttall, Marissa & Pomponi, Shirley A.', 3],
    ['Hoshino, Takaharu', 2],
    ['Manconi, Renata & Pronzato, Roberto & Perino, Erica', 1],
    ['Parra-Velandia, Fernando J. & Zea, Sven & Van Soest, Rob W. M.', 15],
    ['Pereira, Preeti & Raghunathan, Chelladurai', 1],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 7],
    ['Samaai, Toufiek & Pillay, Ruwen & Janson, Liesl', 2],
    ['Sim-Smith, Carina & Hickman, Cleveland & Kelly, Michelle', 2],
    ['Ugalde, Diana & Fernandez, Julio C. C. & Gómez, Patricia', 9],
    ['Ugalde, Diana & Gómez, Patricia & Simões, Nuno', 1],
    ['Van Soest, Rob W. M.', 2],
    ['Van, Rob W. M.', 2],
    ['Łukowiak, Magdalena', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=51)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);