function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calcinai, Barbara & Bastari, Azzurra & Bavestrello, Giorgio', 1],
    ['Cárdenas, Paco & Menegola, Carla & Rapp, Hans Tore', 2],
    ['Esteves, Eduardo L. & Muricy, Guilherme', 2],
    ['Fassbender, Nico & Stefanoudis, Paris V', 1],
    ['Lehnert, Helmut & Stone, Robert P.', 3],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 1],
    ['Schmidt, Eduard Oscar', 6],
    ['Turner, Thomas L. & Lonhart, Steve I.', 1],
    ['Van Soest, Rob W. M.', 7],
    ['Van, Rob W. M.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);