function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dias, Eliseu Vieira', 1],
    ['Laan, Richard Van Der', 22],
    ['López-Arbarello, Adriana & Sun, Zuo-Yu & Sferco, Emilia', 1],
    ['Pradel, Alan & Maisey, John G. & Mapes, Royal H.', 2],
    ['Swartz, Brian A.', 1],
    ['Štamberg, Stanislav', 14],
    ['Štamberg, Stanislav & Schneider, Jörg W. & Werneburg, Ralf', 2],
    ['Štamberg, Stanislav & Steyer, Jean-Sébastien', 5],
    ['Štamberg, Stanislav & Werneburg, Ralf', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);