function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Blair, K. G.', 1],
    ['Bukejs, Andris', 1],
    ['Horák, Jan', 24],
    ['Motschulsky, Victor de', 3],
    ['Pentinsaari, Mikko & Anderson, Robert & Borowiec, Lech', 1],
    ['Selnekovic, David & Goffova, Katarina & Soltys, Jan', 1],
    ['Selnekovic, David & Kodada, Jan', 6],
    ['Selnekovic, David & Ruzzier, Enrico', 10],
    ['Selnekovič, Dávid & Improta, Roberta', 5],
    ['Steury, Brent W. & Steiner, Warren E.', 1],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 3],
    ['Webster, Reginald P. & Webster, Vincent L.', 1],
    ['Zemoglyadchuk, Aleksei & Buialska, Nataliia', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=60)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);